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Sharif Ahmad - One of the best experts on this subject based on the ideXlab platform.
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development of anticorrosive poly ether urethane Amide coatings from linseed oil a sustainable resource
Journal of Polymers and The Environment, 2010Co-Authors: Manawwer Alam, S M Ashraf, Sharif AhmadAbstract:PolyetherAmide(PEtA) resin was synthesized by the condensation polymerization of N,N-bis(2-hydroxy ethyl) linseed oil Fatty Amide diol (HELA) with resorcinol. It was further treated with different percentage of toluylene 2-4-diisocyanate (TDI) to obtain the urethane modified polyetherAmide resins (UPEtA). The structural elucidation of PEtA and urethane modified polyetherAmide(UPEtA) were carried out by FT-IR, 1H-NMR and 13C-NMR spectroscopic techniques. These analyses confirm the formation of PEtA and UPEtA. Physico-chemical and physico-mechanical analysis were performed by standard laboratory methods. The resin composition UPEtA-24 showed best physico-mechanical properties with scratch hardness 2.0 kg, impact resistance 150 lb/in. and good bending ability. The thermal stability and curing behavior of polymers were respectively studied by thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). Thermal analysis shows that these coatings can be used safely upto 190 °C. The coatings of UPEtA resins were prepared on mild steel strips. The anticorrosive behavior of UPEtA coatings were investigated in acid, alkali, water and xylene. All the coatings exhibit good chemical resistance performance in acid, alkali, saline and organic solvents, while the resin UPEtA-24 shows the best performance.
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synthesis characterization and performance of amine modified linseed oil Fatty Amide coatings
Journal of the American Oil Chemists' Society, 2009Co-Authors: Manawwer Alam, S M Ashraf, Alok R Ray, Sharif AhmadAbstract:A novel attempt has been made to develop ambient cured polyamine Amide (PAA) resins by the condensation polymerization reaction of oil Fatty Amide diol (N,N-bis 2-hydroxy ethyl linseed oil Fatty Amide) (HELA) and o-phenylene diamine, which was further modified by poly(styrene-co-maleic anhydride) (SMA) at different phr (parts per hundred part of resin) to get a series of PAA–SMA resins. The structural elucidation of HELA, PAA and PAA–SMA were carried out by FT-IR, 1H-NMR and 13C-NMR spectroscopic techniques. The physico-chemical and physico-mechanical analyses were carried out by standard laboratory methods. Thermal analyses of these resins were accomplished by thermogravimetric analyses (TGA) and differential scanning calorimetry (DSC) techniques. Coatings of PAA–SMA were prepared on mild steel strips to evaluate their physico-mechanical and chemical/corrosion resistance performance under various corrosive environments. It was found that among the PAA–SMA systems, PAA-35 showed the best physico-mechanical and corrosion resistance performance. Thermal studies reveal that the coatings can be safely used up to 305 °C.
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poly urethane Fatty Amide resin from linseed oil a renewable resource
Progress in Organic Coatings, 2009Co-Authors: S Yadav, Fahmina Zafar, Abul Hasnat, Sharif AhmadAbstract:Abstract Poly (urethane Fatty Amide) [PULFA] resin was synthesized by using a one-shot technique at room temperature from diol linseed Fatty Amide [DLFA; a monomer obtained from the aminolysis of renewable resource, such as linseed oil with diethanolamine and sodium methoxide used as a catalyst], 1.0 moles, and varying ratio of toluylene-2,4(6)-diisocyanate [TDI, 0.08–1.5 moles] in minimum amount of xylene without any chain extender and catalyst. In this process phthalic acid/anhydride which is normally used in the synthesis of polyesterAmide was completely replaced by TDI as in case of uralkyd. The reaction mechanism of the same has been discussed here. The mode of reaction and structure of the resin was confirmed by physico-chemical tests and spectral analysis. The performance of the coatings on mild steel strips was tested by physico-mechanical and chemical/corrosion resistance tests. Thermo gravimetric analysis [TGA] and differential scanning calorimetry [DSC] techniques were used to investigate the thermal stability and curing behavior of the resin. The aforementioned properties of newly synthesized resin were compared with those of reported linseed oil-based polyesterAmide urethane [Ur-LPEA, synthesized by partial replacement of phthalic anhydride by TDI] and uralkyd. The newly synthesized resin has shown improved physico-mechanical and corrosion resistance performance to Ur-LPEA and alkyd, whereas to those of uralkyd has comparable results. The PULFA resin exhibits not only superior properties to some of the reported resins, but also helps in the conservation of energy by being synthesized at room temperature as compared to other similar reported systems which were synthesized at reasonably high temperatures. The present study reveals that the PULFA resin can be used as a substitute to Ur-LPEA, alkyd and uralkyd in the field of corrosion protective paints and coatings.
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studies on melamine modified polyesterAmide as anticorrosive coatings from linseed oil a sustainable resource
Journal of Macromolecular Science Part A, 2006Co-Authors: Sharif Ahmad, S M Ashraf, Manawwer AlamAbstract:Melamine modified polyester Amide (MPEA) was synthesized by the reaction of linseed oil Fatty Amide. The resin was further cured at room temperature by polystyrene co‐maleic anhydride (SMA) in different phr (30–80) to obtain MPEA coatings. The probable structure of MPEA was confirmed by FT‐IR, 1H‐NMR and 13C‐NMR spectroscopic techniques. The physico‐chemical characterization of these resins viz. iodine value, saponification value, refractive index, inherent viscosity were carried out by standard methods. MPEA (40 wt%) solution in ethylene glycol monomethyl ether (EGME) was applied on a mild steel strip of standard sizes to study their physico‐mechanical and chemical resistance properties. It was found that coatings of MPEA with 60 parts per hundred of the resin (phr) of SMA showed the best performance in physico‐mechanical and alkali resistance properties. Thermal stability and curing behavior were studied by Thermo Gravimetric Analyses (TGA) and Differential Scanning Calorimetry (DSC), respectively.
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ambient cured polyesterAmide based anticorrosive coatings from linseed oil a sustainable resource
Journal of Applied Polymer Science, 2005Co-Authors: Fahmina Zafar, S M Ashraf, Eram Sharmin, Sharif AhmadAbstract:Ambient-cured polyesterAmide (APEA) coating resin synthesized from dihydroxy Fatty Amide obtained from linseed oil, a sustainable resource, and poly(styrene-co-maleic anhydride), a bifunctional acid component, was found to exhibit improved physicomechanical and anticorrosive properties. The structural elucidation of APEA resin has been carried out by FTIR, 1H-NMR, and 13C-NMR spectroscopies. The physicomechanical and chemical resistance properties were investigated by standard methods. The corrosion resistance performance was evaluated in acid, alkali, and organic solvent. The thermal behavior was studied by TGA technique. A comparative study of these properties of APEA with reported baked polyesterAmide (PEA) coatings was carried out. A remarkable improvement in the drying property of APEA was observed. The APEA coatings also showed improved physicomechanical and anticorrosive properties as compared to the baked PEA coatings. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 97: 1818–1824, 2005
Manawwer Alam - One of the best experts on this subject based on the ideXlab platform.
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mechanically strong hydrophobic antimicrobial and corrosion protective polyesterAmide nanocomposite coatings from leucaena leucocephala oil a sustainable resource
ACS Omega, 2020Co-Authors: Manawwer Alam, Naser M Alandis, Eram Sharmin, Naushad Ahmad, Fohad Mabood Husain, Aslam KhanAbstract:The aim of this research work is to develop polyesterAmide [LMPEA] nanocomposite coating material [LMPEA/Ag] using N,N-bis(2-hydroxyethyl) Fatty Amide obtained from non-edible Leucaena leucocephala [LL] seed oil [LLO], and maleic anhydride, reinforced with silver nanoparticles [SNPs], biosynthesized in Leucaena leucocephala leaf extract. UV, XRD, TEM, and particle size analyses confirmed the biosynthesis of NP (37.55 nm). FTIR and NMR established the structure of LMPEA formed by esterification reaction, without any solvent/diluent. Coatings were mechanically strong, well adherent to substrate, flexibility retentive, hydrophobic, and antimicrobial as evident from good scratch hardness (2-3 kg), impact resistance (150 lb per inch), bend test (1/8 inch), high water contact angle measurement value (109°) relative to pristine LMPEA coating (89°), and broad-spectrum antimicrobial behavior against MRSA, P. aeruginosa, E. coli, A. baumannii, and C. albicans. LMPEA and LMPEA/Ag exhibited high corrosion protection efficiencies, 99.81% and 99.94%, respectively, in (3.5% w/v) NaCl solution for 20 days and safe usage up to 200 °C. The synthesized nanocomposite coatings provide an alternate pathway for utilization of non-edible Leucaena leucocephala seed oil through a safer chemical synthesis route, without the use/generation of any harmful solvent/toxic products, adopting "Green Chemistry" principles.
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corn oil based poly ether Amide urethane coating material synthesis characterization and coating properties
Industrial Crops and Products, 2014Co-Authors: Manawwer Alam, Naser M AlandisAbstract:Abstract PolyetherAmide (CPETA) resin was synthesized from N,N-bis (2-hydroxy ethyl) corn oil Fatty Amide (HECFA) and catechol through condensation polymerization. CPETA was further cured with isophorone diisocyanate (IPDI) in different weight percentage (20, 25, 30, 35, 40 wt.%) to obtain poly(ether Amide urethane) (CPETAU). The structural elucidation of HECFA, CPETA and CPETAU was carried out by FT-IR, 1H NMR and 13C NMR spectroscopic techniques. Physico-chemical and physico-mechanical properties of these resins were investigated by standard methods. Thermal behavior was assessed by thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). The corrosion resistance performance of CPETAU coatings on mild steel strips was investigated by potentiodynamic polarization studies in different corrosive media (3.5 wt.% HCl, 5.0 wt.% NaCl, tap water) at room temperature. Amongst all the compositions, CPETAU coatings showed good scratch hardness (2.20 kg), impact resistance (150 lb/inch), gloss with corrosion rate obtained as 1.377 × 10−2 (mm/year) and 2.359 × 10−3 (mm/year) in 3.5 wt.% HCl and 5.0 wt.% NaCl solution, respectively. CPETAU coatings can be safely used up to 250 °C.
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development of ambient cured polyesterAmide coatings from linseed oil a sustainable resource
Journal of Polymers and The Environment, 2011Co-Authors: Manawwer Alam, Naser M AlandisAbstract:The resourceful employment of vegetable oil based polymers in coating applications that yield novel properties, faces challenges usually in their processing. We have developed polyesterAmide coatings from linseed (Linnum ussitatissium seeds) oil with improved coating properties. Linseed oil was first converted into N, N-bis 2-hydroxy ethyl linseed oil Fatty Amide diol (HELA). The resin was synthesized by the reaction of HELA with ethylenediaminetetraacetic acid (EDTA) to develop ethylenediamine polyesterAmide (Ed-PEA). The latter was further treated with poly (styrene co-maleic anhydride) (SMA) in different (35–50) phr (part per hundred part of resin) to obtain ambient cured polyesterAmide (AC-PEA). The structural elucidation of polymeric resin (AC-PEA) was carried out by FT-IR, 1H-NMR, and 13C-NMR spectroscopic techniques. Thermal behavior of AC-PEA was studied by thermogravimetric analyses (TGA) and differential scanning calorimetry (DSC). The coatings of AC-PEA were prepared on mild steel strips to investigate their physico-mechanical and anticorrosive behavior (in acid, alkali, water and xylene). It was found that among all the samples, the one having 45 phr of SMA showed the best physico-mechanical and corrosion resistance performance. The thermal stability performance suggests that AC-PEA45 system could be safely used up to 150 °C.
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development of anticorrosive poly ether urethane Amide coatings from linseed oil a sustainable resource
Journal of Polymers and The Environment, 2010Co-Authors: Manawwer Alam, S M Ashraf, Sharif AhmadAbstract:PolyetherAmide(PEtA) resin was synthesized by the condensation polymerization of N,N-bis(2-hydroxy ethyl) linseed oil Fatty Amide diol (HELA) with resorcinol. It was further treated with different percentage of toluylene 2-4-diisocyanate (TDI) to obtain the urethane modified polyetherAmide resins (UPEtA). The structural elucidation of PEtA and urethane modified polyetherAmide(UPEtA) were carried out by FT-IR, 1H-NMR and 13C-NMR spectroscopic techniques. These analyses confirm the formation of PEtA and UPEtA. Physico-chemical and physico-mechanical analysis were performed by standard laboratory methods. The resin composition UPEtA-24 showed best physico-mechanical properties with scratch hardness 2.0 kg, impact resistance 150 lb/in. and good bending ability. The thermal stability and curing behavior of polymers were respectively studied by thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). Thermal analysis shows that these coatings can be used safely upto 190 °C. The coatings of UPEtA resins were prepared on mild steel strips. The anticorrosive behavior of UPEtA coatings were investigated in acid, alkali, water and xylene. All the coatings exhibit good chemical resistance performance in acid, alkali, saline and organic solvents, while the resin UPEtA-24 shows the best performance.
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synthesis characterization and performance of amine modified linseed oil Fatty Amide coatings
Journal of the American Oil Chemists' Society, 2009Co-Authors: Manawwer Alam, S M Ashraf, Alok R Ray, Sharif AhmadAbstract:A novel attempt has been made to develop ambient cured polyamine Amide (PAA) resins by the condensation polymerization reaction of oil Fatty Amide diol (N,N-bis 2-hydroxy ethyl linseed oil Fatty Amide) (HELA) and o-phenylene diamine, which was further modified by poly(styrene-co-maleic anhydride) (SMA) at different phr (parts per hundred part of resin) to get a series of PAA–SMA resins. The structural elucidation of HELA, PAA and PAA–SMA were carried out by FT-IR, 1H-NMR and 13C-NMR spectroscopic techniques. The physico-chemical and physico-mechanical analyses were carried out by standard laboratory methods. Thermal analyses of these resins were accomplished by thermogravimetric analyses (TGA) and differential scanning calorimetry (DSC) techniques. Coatings of PAA–SMA were prepared on mild steel strips to evaluate their physico-mechanical and chemical/corrosion resistance performance under various corrosive environments. It was found that among the PAA–SMA systems, PAA-35 showed the best physico-mechanical and corrosion resistance performance. Thermal studies reveal that the coatings can be safely used up to 305 °C.
Vikas V Gite - One of the best experts on this subject based on the ideXlab platform.
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functional anti corrosive and anti bacterial surface coatings based on mercaptosuccinic and thiodipropionic acids and algae oil as renewable feedstock
Reactive & Functional Polymers, 2019Co-Authors: Chandrashekhar K Patil, Harishchandra D Jirimali, Mahendra S Mahajan, Jayasinh S Paradeshi, Bhushan L Chaudhari, Vikas V GiteAbstract:Abstract Renewable source based anticorrosive and antimicrobial polyesterAmide polyols were synthesized by reacting algae oil with diethanolamine and thio diacids viz. mercaptosuccinic (MSA) and thiodipropionic (TPA) acids. The confirmation of structures and molecular weights of prepared polyols were done by 1H NMR and FTIR spectroscopic techniques, and size exclusion chromatography (SEC), respectively. The polyols were used to prepare PU which showed excellent adhesion (100%) as compared to algae oil Fatty Amide (AOFA) (88%) high gloss (118 and 115). This PU passed flexibility test and showed good chemical resistance in comparison to the AOFA based PU coatings. The prepared PU coatings were checked for the anticorrosive property by dipping and electrochemical method performed against 3.5 wt% NaCl and 5 wt% HCl corrosive media. The PEA- PU possessed lower corrosion rate (mm/year) and Icorr values as well as high polarization resistance (Rp) and inhibition efficiency, than uncoated (blank) and AOFA based PU (PU-AOFA). Both MSA and TPA based PU coatings showed good antimicrobial potential and reduction in bacterial attachment, against Gram - negative (E. coli) and Gram - positive (S. aureus) bacteria in comparison to the control and AOFA PU coatings as observed through SEM and the thermal stability of modified PUs was also improved.
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development of anticorrosive two pack polyurethane coatings based on modified Fatty Amide of azadirachta indica juss oil cured at room temperature a sustainable resource
RSC Advances, 2014Co-Authors: Ashok Chaudhari, Anil Kuwar, P P Mahulikar, D G Hundiwale, Ravindra D Kulkarni, Vikas V GiteAbstract:We report the modification of Azadirachta indica Juss oil (renewable source) Fatty Amide by the piperazine molecule to develop a new polyol. Two pack polyurethane (PU) coatings on mild steel plates were prepared by reacting newly developed polyol with toluene diisocyanate (TDI) at room temperature. Spectral studies of Azadirachta indica Juss oil based Fatty Amide and piperazine modified Fatty Amide were carried out using spectroscopic techniques to confirm the modification. The prepared resins were also characterized by end group analysis such as amine and hydroxyl values. Anticorrosive properties of the prepared PU coatings were examined by immersion test in an aqueous salt solution. The thermal stability of coatings was studied by TGA. Other coating properties such as gloss, scratch hardness, adhesion, flexibility, impact resistance and chemical resistance were evaluated using standard methods. It was observed that the presence of nitrogen containing piperazine moiety in the back bone of the PU chain shows better anticorrosive properties compared with the Azadirachta indica Juss oil Fatty Amide based PU coatings.
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high performance moisture cured poly ether urethane Amide coatings based on renewable resource cottonseed oil
Journal of Coatings Technology and Research, 2013Co-Authors: Pawan D. Meshram, Ravindra G. Puri, Amol L. Patil, Vikas V GiteAbstract:In this investigation, polyetherAmide resin was prepared through the condensation polymerization of N,N-bis (2-hydroxyethyl) cottonseed oil Fatty Amide (HECOFA) with bisphenol-A. It was further modified by 2,4-toluene diisocyanate (TDI) in 10–30 wt% of polyetherAmide to develop a series of moisture curing urethane-modified polyetherAmide resins (UMCOPEtA). The synthesized resin was characterized using 1H NMR, 13C NMR, FTIR and solubility in various organic solvents at room temperature. The thermal and curing behavior of the resin was investigated using thermogravimetric analysis and differential scanning calorimetric techniques. The physico-chemical properties such as hydroxyl value, iodine value, specific gravity and mechanical properties like scratch hardness, impact, and flexibility were determined by standard laboratory methods. Coatings of UMCOPEtA resin were prepared on mild steel panels to evaluate chemical resistance performance against acid, alkali, water and xylene. The newly developed UMCOPEtA coatings showed improved hardness, impact, gloss, water and chemical resistance when compared with unmodified polyetherAmide coatings, and thus were found to be suitable as a high performance coating material.
S M Ashraf - One of the best experts on this subject based on the ideXlab platform.
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development of anticorrosive poly ether urethane Amide coatings from linseed oil a sustainable resource
Journal of Polymers and The Environment, 2010Co-Authors: Manawwer Alam, S M Ashraf, Sharif AhmadAbstract:PolyetherAmide(PEtA) resin was synthesized by the condensation polymerization of N,N-bis(2-hydroxy ethyl) linseed oil Fatty Amide diol (HELA) with resorcinol. It was further treated with different percentage of toluylene 2-4-diisocyanate (TDI) to obtain the urethane modified polyetherAmide resins (UPEtA). The structural elucidation of PEtA and urethane modified polyetherAmide(UPEtA) were carried out by FT-IR, 1H-NMR and 13C-NMR spectroscopic techniques. These analyses confirm the formation of PEtA and UPEtA. Physico-chemical and physico-mechanical analysis were performed by standard laboratory methods. The resin composition UPEtA-24 showed best physico-mechanical properties with scratch hardness 2.0 kg, impact resistance 150 lb/in. and good bending ability. The thermal stability and curing behavior of polymers were respectively studied by thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). Thermal analysis shows that these coatings can be used safely upto 190 °C. The coatings of UPEtA resins were prepared on mild steel strips. The anticorrosive behavior of UPEtA coatings were investigated in acid, alkali, water and xylene. All the coatings exhibit good chemical resistance performance in acid, alkali, saline and organic solvents, while the resin UPEtA-24 shows the best performance.
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synthesis characterization and performance of amine modified linseed oil Fatty Amide coatings
Journal of the American Oil Chemists' Society, 2009Co-Authors: Manawwer Alam, S M Ashraf, Alok R Ray, Sharif AhmadAbstract:A novel attempt has been made to develop ambient cured polyamine Amide (PAA) resins by the condensation polymerization reaction of oil Fatty Amide diol (N,N-bis 2-hydroxy ethyl linseed oil Fatty Amide) (HELA) and o-phenylene diamine, which was further modified by poly(styrene-co-maleic anhydride) (SMA) at different phr (parts per hundred part of resin) to get a series of PAA–SMA resins. The structural elucidation of HELA, PAA and PAA–SMA were carried out by FT-IR, 1H-NMR and 13C-NMR spectroscopic techniques. The physico-chemical and physico-mechanical analyses were carried out by standard laboratory methods. Thermal analyses of these resins were accomplished by thermogravimetric analyses (TGA) and differential scanning calorimetry (DSC) techniques. Coatings of PAA–SMA were prepared on mild steel strips to evaluate their physico-mechanical and chemical/corrosion resistance performance under various corrosive environments. It was found that among the PAA–SMA systems, PAA-35 showed the best physico-mechanical and corrosion resistance performance. Thermal studies reveal that the coatings can be safely used up to 305 °C.
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studies on melamine modified polyesterAmide as anticorrosive coatings from linseed oil a sustainable resource
Journal of Macromolecular Science Part A, 2006Co-Authors: Sharif Ahmad, S M Ashraf, Manawwer AlamAbstract:Melamine modified polyester Amide (MPEA) was synthesized by the reaction of linseed oil Fatty Amide. The resin was further cured at room temperature by polystyrene co‐maleic anhydride (SMA) in different phr (30–80) to obtain MPEA coatings. The probable structure of MPEA was confirmed by FT‐IR, 1H‐NMR and 13C‐NMR spectroscopic techniques. The physico‐chemical characterization of these resins viz. iodine value, saponification value, refractive index, inherent viscosity were carried out by standard methods. MPEA (40 wt%) solution in ethylene glycol monomethyl ether (EGME) was applied on a mild steel strip of standard sizes to study their physico‐mechanical and chemical resistance properties. It was found that coatings of MPEA with 60 parts per hundred of the resin (phr) of SMA showed the best performance in physico‐mechanical and alkali resistance properties. Thermal stability and curing behavior were studied by Thermo Gravimetric Analyses (TGA) and Differential Scanning Calorimetry (DSC), respectively.
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ambient cured polyesterAmide based anticorrosive coatings from linseed oil a sustainable resource
Journal of Applied Polymer Science, 2005Co-Authors: Fahmina Zafar, S M Ashraf, Eram Sharmin, Sharif AhmadAbstract:Ambient-cured polyesterAmide (APEA) coating resin synthesized from dihydroxy Fatty Amide obtained from linseed oil, a sustainable resource, and poly(styrene-co-maleic anhydride), a bifunctional acid component, was found to exhibit improved physicomechanical and anticorrosive properties. The structural elucidation of APEA resin has been carried out by FTIR, 1H-NMR, and 13C-NMR spectroscopies. The physicomechanical and chemical resistance properties were investigated by standard methods. The corrosion resistance performance was evaluated in acid, alkali, and organic solvent. The thermal behavior was studied by TGA technique. A comparative study of these properties of APEA with reported baked polyesterAmide (PEA) coatings was carried out. A remarkable improvement in the drying property of APEA was observed. The APEA coatings also showed improved physicomechanical and anticorrosive properties as compared to the baked PEA coatings. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 97: 1818–1824, 2005
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studies on new polyetherAmide butylated melamine formaldehyde based anticorrosive coatings from a sustainable resource
Progress in Organic Coatings, 2005Co-Authors: Sharif Ahmad, S M Ashraf, Eram Sharmin, Mubina Nazir, Manawwer AlamAbstract:Abstract PolyetherAmide (PEtA) resin was synthesized through the condensation polymerization of N , N -bis (2-hydroxy ethyl) linseed oil Fatty Amide with bisphenol-A. The structural elucidation of PEtA was carried out by FT-IR, 1 H–NMR and 13 C–NMR spectroscopic techniques. The physico-chemical characterization of the resin was done by standard methods. PEtA was further treated with butylated melamine formaldehyde (BMF) in different weight percentages and applied on mild steel strips of standard sizes by brush. The resin systems were then cured at different temperatures to obtain the optimum curing temperature. The cured resin systems were subjected to spectroscopic analyses to ascertain the structure of the same. The thermal stability and curing behaviour were studied by thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC), respectively. The physico-mechanical properties and anticorrosive performance of the PEtA–BMF systems were also evaluated. The effect of BMF loading and the influence of increase in curing temperature on aforementioned properties were also investigated. The studies revealed that the PEtA–BMF systems performed well as an anticorrosive coatings material.
Naser M Alandis - One of the best experts on this subject based on the ideXlab platform.
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mechanically strong hydrophobic antimicrobial and corrosion protective polyesterAmide nanocomposite coatings from leucaena leucocephala oil a sustainable resource
ACS Omega, 2020Co-Authors: Manawwer Alam, Naser M Alandis, Eram Sharmin, Naushad Ahmad, Fohad Mabood Husain, Aslam KhanAbstract:The aim of this research work is to develop polyesterAmide [LMPEA] nanocomposite coating material [LMPEA/Ag] using N,N-bis(2-hydroxyethyl) Fatty Amide obtained from non-edible Leucaena leucocephala [LL] seed oil [LLO], and maleic anhydride, reinforced with silver nanoparticles [SNPs], biosynthesized in Leucaena leucocephala leaf extract. UV, XRD, TEM, and particle size analyses confirmed the biosynthesis of NP (37.55 nm). FTIR and NMR established the structure of LMPEA formed by esterification reaction, without any solvent/diluent. Coatings were mechanically strong, well adherent to substrate, flexibility retentive, hydrophobic, and antimicrobial as evident from good scratch hardness (2-3 kg), impact resistance (150 lb per inch), bend test (1/8 inch), high water contact angle measurement value (109°) relative to pristine LMPEA coating (89°), and broad-spectrum antimicrobial behavior against MRSA, P. aeruginosa, E. coli, A. baumannii, and C. albicans. LMPEA and LMPEA/Ag exhibited high corrosion protection efficiencies, 99.81% and 99.94%, respectively, in (3.5% w/v) NaCl solution for 20 days and safe usage up to 200 °C. The synthesized nanocomposite coatings provide an alternate pathway for utilization of non-edible Leucaena leucocephala seed oil through a safer chemical synthesis route, without the use/generation of any harmful solvent/toxic products, adopting "Green Chemistry" principles.
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corn oil based poly ether Amide urethane coating material synthesis characterization and coating properties
Industrial Crops and Products, 2014Co-Authors: Manawwer Alam, Naser M AlandisAbstract:Abstract PolyetherAmide (CPETA) resin was synthesized from N,N-bis (2-hydroxy ethyl) corn oil Fatty Amide (HECFA) and catechol through condensation polymerization. CPETA was further cured with isophorone diisocyanate (IPDI) in different weight percentage (20, 25, 30, 35, 40 wt.%) to obtain poly(ether Amide urethane) (CPETAU). The structural elucidation of HECFA, CPETA and CPETAU was carried out by FT-IR, 1H NMR and 13C NMR spectroscopic techniques. Physico-chemical and physico-mechanical properties of these resins were investigated by standard methods. Thermal behavior was assessed by thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). The corrosion resistance performance of CPETAU coatings on mild steel strips was investigated by potentiodynamic polarization studies in different corrosive media (3.5 wt.% HCl, 5.0 wt.% NaCl, tap water) at room temperature. Amongst all the compositions, CPETAU coatings showed good scratch hardness (2.20 kg), impact resistance (150 lb/inch), gloss with corrosion rate obtained as 1.377 × 10−2 (mm/year) and 2.359 × 10−3 (mm/year) in 3.5 wt.% HCl and 5.0 wt.% NaCl solution, respectively. CPETAU coatings can be safely used up to 250 °C.
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development of ambient cured polyesterAmide coatings from linseed oil a sustainable resource
Journal of Polymers and The Environment, 2011Co-Authors: Manawwer Alam, Naser M AlandisAbstract:The resourceful employment of vegetable oil based polymers in coating applications that yield novel properties, faces challenges usually in their processing. We have developed polyesterAmide coatings from linseed (Linnum ussitatissium seeds) oil with improved coating properties. Linseed oil was first converted into N, N-bis 2-hydroxy ethyl linseed oil Fatty Amide diol (HELA). The resin was synthesized by the reaction of HELA with ethylenediaminetetraacetic acid (EDTA) to develop ethylenediamine polyesterAmide (Ed-PEA). The latter was further treated with poly (styrene co-maleic anhydride) (SMA) in different (35–50) phr (part per hundred part of resin) to obtain ambient cured polyesterAmide (AC-PEA). The structural elucidation of polymeric resin (AC-PEA) was carried out by FT-IR, 1H-NMR, and 13C-NMR spectroscopic techniques. Thermal behavior of AC-PEA was studied by thermogravimetric analyses (TGA) and differential scanning calorimetry (DSC). The coatings of AC-PEA were prepared on mild steel strips to investigate their physico-mechanical and anticorrosive behavior (in acid, alkali, water and xylene). It was found that among all the samples, the one having 45 phr of SMA showed the best physico-mechanical and corrosion resistance performance. The thermal stability performance suggests that AC-PEA45 system could be safely used up to 150 °C.
