The Experts below are selected from a list of 291 Experts worldwide ranked by ideXlab platform
M. Kasiriha - One of the best experts on this subject based on the ideXlab platform.
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Tung Oil an autonomous repairing agent for self healing epoxy coatings
Progress in Organic Coatings, 2011Co-Authors: M. Samadzadeh, Mohammad Peikari, Ali Ashrafi, Hatami S Boura, M. KasirihaAbstract:The capability of the encapsulated Tung Oil was investigated as a scratch healing agent for self-healing coatings. Encapsulation of Tung Oil with urea–formaldehyde shell was carried out by in situ polymerization. Before the mechanical agitation of microcapsules into epoxy resin, their characteristics were evaluated by scanning electron microscope (SEM) and Fourier transform infrared spectroscopy (FTIR). Released Tung Oil from ruptured microcapsules healed the artificial scratch in the coating matrix successfully. Corrosion resistance of healed area was evaluated by electrochemical impedance spectroscopy (EIS) and immersion test; and the results were compared with neat epoxy coating.
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Tung Oil: An autonomous repairing agent for self-healing epoxy coatings
Progress in Organic Coatings, 2011Co-Authors: M. Samadzadeh, S. Hatami Boura, Mohammad Peikari, Ali Ashrafi, M. KasirihaAbstract:The capability of the encapsulated Tung Oil was investigated as a scratch healing agent for self-healing coatings. Encapsulation of Tung Oil with urea-formaldehyde shell was carried out by in situ polymerization. Before the mechanical agitation of microcapsules into epoxy resin, their characteristics were evaluated by scanning electron microscope (SEM) and Fourier transform infrared spectroscopy (FTIR). Released Tung Oil from ruptured microcapsules healed the artificial scratch in the coating matrix successfully. Corrosion resistance of healed area was evaluated by electrochemical impedance spectroscopy (EIS) and immersion test; and the results were compared with neat epoxy coating. © 2010 Elsevier B.V. All rights reserved.
Yonghong Zhou - One of the best experts on this subject based on the ideXlab platform.
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Preparation and characterization of Tung Oil-based flame retardant polyols
Chinese Journal of Chemical Engineering, 2018Co-Authors: Wei Zhou, Yonghong Zhou, Meng ZhangAbstract:Abstract Three kinds of Tung Oil-based structural flame retardants polyols (TOFPs) were prepared by new methods in this paper. First, Tung Oil was used to produce monoglyceride and diglyceride by transesterification with glycerol by sodium methoxide. The products after transesterification were epoxidized by peracetic acid which was in-situ generated from acetic acid and hydrogen peroxide in the presence of sulfuric acid catalyst. And then, TOFPs were prepared from epoxidized alcoholysis Tung Oil (EGTO) with 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO), diethyl phosphate (DEP) and diethanolamine (DEA) by ring-opening reactions, respectively. GPC was used to evaluate the conversion rate, at optimum reaction conditions, selectivity for monoglyceride in transesterification. The influence of different parameters such as temperature, mole ratio or mass ratio on the conversion rate of transesterification and epoxidation were investigated. The molecular structures of TOFPs were characterized by FTIR and 1HNMR. Finally, Tung Oil-based polyurethane foams (TOPUFs) were prepared by a one-shot process using TOFPs with polyisocyanate. The LOI values of TOPUFs whose content of DOPO-EGTO, DEP-EGTO and DEA-EGTO were 100 wt% can reach to 26.2%, 25.1%, and 24.4%, respectively.
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internally plasticized pvc materials via covalent attachment of aminated Tung Oil methyl ester
RSC Advances, 2017Co-Authors: Li Hong Hu, Meng Zhang, Xiaohui Yang, Qianqian Shang, Yonghong ZhouAbstract:We developed an internal plasticizer of aminated Tung Oil methyl ester for the production of non-migration, phthalate-free flexible and internally plasticized poly(vinyl chloride) (PVC) materials. The chemical structure of the synthesized aminated Tung Oil methyl ester and the internally plasticized PVC materials were characterized. The obtained internally plasticized PVC materials presented a lower glass transition temperature (Tg) and were more flexible than pure PVC. The thermal stability of internally plasticized PVC materials was less thermally stable compared to those of pure PVC due to the active secondary amine groups of aminated Tung Oil methyl ester. However, the modified PVC materials presented no migration for self-plasticizing PVC films but 15.7% weight loss for 50 wt% of the PVC/Dioctyl phthalate (DOP) system. It is expected that the PVC materials can be widely used in areas with high migration resistance requirements.
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phase separation dominating mechanical properties of a novel Tung Oil based thermosetting polymer
Industrial Crops and Products, 2013Co-Authors: Chengshuang Wang, Yonghong Zhou, Liyun ZhangAbstract:Abstract This paper focuses on the structure–property relationship of a Tung-Oil-based thermosetting polymer, which was obtained by curing a newly developed Tung-Oil-based monomer (TOPERMA) with different styrene contents. Phase separation was first observed from transparency of the polymer matrixes and further studied by scanning electron microscopy (SEM). The separation resulted from the incompatibility of maleinated Oil-based resins and styrene, and might be influenced by curing temperature and reactivity ratios of the reactive monomers. By dynamic mechanical analysis (DMA) storage modulus, glass transition temperature, and crosslink density of the bio-based polymer materials were investigated. The two effects of phase separation and crosslink density were used to correlate the microstructure factors with the obtained thermo-mechanical and mechanical properties of the Tung-Oil-based resins. It was found that the phase-separation effect was the dominating factor affecting the mechanical properties rather than other factors. The matrix of TOPERMA with 33% styrene exhibited good stiffness–toughness balance due to the minimum extent of phase separation it had. This developed eco-friendly bio-based polymer shows potential structural application as sheeting molding compounds.
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Novel Biobased Materials from Tung Oil-Based Monomer and Tung Oil-Modified Unsaturated Polyester
Advanced Materials Research, 2012Co-Authors: Yonghong Zhou, Li Hong HuAbstract:Two kinds of novel biobased materials were obtained by copolymerization of Tung Oil -based monomer (TOPERMA) or Tung Oil-modified unsaturated polyester (UPE-TO) with styrene. Mechanical and thermal properties of the two TO-based biopolymers were presented and compared. It was shown that the UPE-TO polymer matrix showed better toughness than the pure unsaturated polyester (UPE) matrix, while the TOPERMA polymer matrix had better thermal stability than the UPE-TO and the pure UPE matrixes by thermogravimetric analysis (TGA). These Tung Oil-based polymers show promise as an alternative to replace petroleum-based materials.
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Tung Oil based monomer for thermosetting polymers synthesis characterization and copolymerization with styrene
Bioresources, 2012Co-Authors: Xiaohui Yang, Yonghong Zhou, Li Hong Hu, Meng ZhangAbstract:A Tung Oil (TO) based monomer for rigid thermosetting polymer was synthesized, characterized, and copolymerized with styrene in this study. Tung Oil was alcoholyzed with pentaerythritol (PER) to get Tung Oil pentaerythritol alcoholysis products (TOPER), and the optimized conditions were explored according to the yields of TOPER analyzed by gas chromatography-mass spectrometry (GC-MS). The resulting alcoholysis products were maleinated to form Tung Oil maleate half ester (TOPERMA), and the reaction conditions were determined by monitoring the reaction extents of TOPER and maleic anhydride (MA) with 1HNMR spectroscopy. The TO alcoholysis and maleinization reaction products were characterized by IR, 1HNMR, and electrospray ionization-mass spectrometry (ESI-MS) techniques. At last, the TOPERMA mixture was cured with styrene (St), and the initiator tert-butyl peroxy benzoate (TPB). Differential scanning calorimetry (DSC) was employed to characterize the curing process. Mechanical properties of the cured TOPERMA/St resin further confirmed the best procedure for the maleinization reaction. The loading of TO reached about 30% weight of the resulting thermosetting polymer. This promising material from renewable resources can be a potential substitution for petroleum products when used as sheet molding compounds.
M. Samadzadeh - One of the best experts on this subject based on the ideXlab platform.
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Tung Oil an autonomous repairing agent for self healing epoxy coatings
Progress in Organic Coatings, 2011Co-Authors: M. Samadzadeh, Mohammad Peikari, Ali Ashrafi, Hatami S Boura, M. KasirihaAbstract:The capability of the encapsulated Tung Oil was investigated as a scratch healing agent for self-healing coatings. Encapsulation of Tung Oil with urea–formaldehyde shell was carried out by in situ polymerization. Before the mechanical agitation of microcapsules into epoxy resin, their characteristics were evaluated by scanning electron microscope (SEM) and Fourier transform infrared spectroscopy (FTIR). Released Tung Oil from ruptured microcapsules healed the artificial scratch in the coating matrix successfully. Corrosion resistance of healed area was evaluated by electrochemical impedance spectroscopy (EIS) and immersion test; and the results were compared with neat epoxy coating.
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Tung Oil: An autonomous repairing agent for self-healing epoxy coatings
Progress in Organic Coatings, 2011Co-Authors: M. Samadzadeh, S. Hatami Boura, Mohammad Peikari, Ali Ashrafi, M. KasirihaAbstract:The capability of the encapsulated Tung Oil was investigated as a scratch healing agent for self-healing coatings. Encapsulation of Tung Oil with urea-formaldehyde shell was carried out by in situ polymerization. Before the mechanical agitation of microcapsules into epoxy resin, their characteristics were evaluated by scanning electron microscope (SEM) and Fourier transform infrared spectroscopy (FTIR). Released Tung Oil from ruptured microcapsules healed the artificial scratch in the coating matrix successfully. Corrosion resistance of healed area was evaluated by electrochemical impedance spectroscopy (EIS) and immersion test; and the results were compared with neat epoxy coating. © 2010 Elsevier B.V. All rights reserved.
Mark D Soucek - One of the best experts on this subject based on the ideXlab platform.
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synthesis of uv curable Tung Oil and uv curable Tung Oil based alkyd
Progress in Organic Coatings, 2012Co-Authors: Narin Thanamongkollit, Kent R Miller, Mark D SoucekAbstract:Two UV-curable Tung Oil-based resins were synthesized via a Diels–Alder cycloaddition. An UV-curable Tung Oil (UVTO) was prepared from bodied Tung Oil and trimethylolpropane trimethacrylate (TMPTMA). An inhibitor, phenothiazine, was added to avoid homopolymerization of TMPTMA. The UV-curable Tung Oil alkyd (UVTA) was prepared from the monoglyceride process and then reacted with TMPTMA via the Diels–Alder reaction similar to the UVTO. The UVTO and UVTA were characterized by 1H NMR, 13C NMR, and MALDI-TOF mass spectroscopy. The UVTO and UVTA were formulated with a free radical reactive diluent, tripropylene glycol diacrylate (TPGDA) and photoinitiator Irgacure 2100. Photo differential scanning calorimeter (Photo-DSC) was used to investigate curing kinetics of the UVTO and the UVTA. Both the UVTO and UVTA were photocurable with the UVTA formula exhibiting a faster curing speed than the UVTO.
Li Hong Hu - One of the best experts on this subject based on the ideXlab platform.
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internally plasticized pvc materials via covalent attachment of aminated Tung Oil methyl ester
RSC Advances, 2017Co-Authors: Li Hong Hu, Meng Zhang, Xiaohui Yang, Qianqian Shang, Yonghong ZhouAbstract:We developed an internal plasticizer of aminated Tung Oil methyl ester for the production of non-migration, phthalate-free flexible and internally plasticized poly(vinyl chloride) (PVC) materials. The chemical structure of the synthesized aminated Tung Oil methyl ester and the internally plasticized PVC materials were characterized. The obtained internally plasticized PVC materials presented a lower glass transition temperature (Tg) and were more flexible than pure PVC. The thermal stability of internally plasticized PVC materials was less thermally stable compared to those of pure PVC due to the active secondary amine groups of aminated Tung Oil methyl ester. However, the modified PVC materials presented no migration for self-plasticizing PVC films but 15.7% weight loss for 50 wt% of the PVC/Dioctyl phthalate (DOP) system. It is expected that the PVC materials can be widely used in areas with high migration resistance requirements.
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Novel Biobased Materials from Tung Oil-Based Monomer and Tung Oil-Modified Unsaturated Polyester
Advanced Materials Research, 2012Co-Authors: Yonghong Zhou, Li Hong HuAbstract:Two kinds of novel biobased materials were obtained by copolymerization of Tung Oil -based monomer (TOPERMA) or Tung Oil-modified unsaturated polyester (UPE-TO) with styrene. Mechanical and thermal properties of the two TO-based biopolymers were presented and compared. It was shown that the UPE-TO polymer matrix showed better toughness than the pure unsaturated polyester (UPE) matrix, while the TOPERMA polymer matrix had better thermal stability than the UPE-TO and the pure UPE matrixes by thermogravimetric analysis (TGA). These Tung Oil-based polymers show promise as an alternative to replace petroleum-based materials.
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Tung Oil based monomer for thermosetting polymers synthesis characterization and copolymerization with styrene
Bioresources, 2012Co-Authors: Xiaohui Yang, Yonghong Zhou, Li Hong Hu, Meng ZhangAbstract:A Tung Oil (TO) based monomer for rigid thermosetting polymer was synthesized, characterized, and copolymerized with styrene in this study. Tung Oil was alcoholyzed with pentaerythritol (PER) to get Tung Oil pentaerythritol alcoholysis products (TOPER), and the optimized conditions were explored according to the yields of TOPER analyzed by gas chromatography-mass spectrometry (GC-MS). The resulting alcoholysis products were maleinated to form Tung Oil maleate half ester (TOPERMA), and the reaction conditions were determined by monitoring the reaction extents of TOPER and maleic anhydride (MA) with 1HNMR spectroscopy. The TO alcoholysis and maleinization reaction products were characterized by IR, 1HNMR, and electrospray ionization-mass spectrometry (ESI-MS) techniques. At last, the TOPERMA mixture was cured with styrene (St), and the initiator tert-butyl peroxy benzoate (TPB). Differential scanning calorimetry (DSC) was employed to characterize the curing process. Mechanical properties of the cured TOPERMA/St resin further confirmed the best procedure for the maleinization reaction. The loading of TO reached about 30% weight of the resulting thermosetting polymer. This promising material from renewable resources can be a potential substitution for petroleum products when used as sheet molding compounds.
