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Chin-ping Yang - One of the best experts on this subject based on the ideXlab platform.
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Fluorinated Aromatic Polyamides and Poly(amide‐imide)s: Synthesis and Properties
Macromolecular Chemistry and Physics, 2005Co-Authors: Chin-ping YangAbstract:A CF 3 -containing diamine, 4,4'-bis(4-amino-2-trifluoromethylphenoxy)biphenyl (I), was synthesized from 4,4'-biphenol and 2-chloro-5-nitrobenzotrifluoride. The imide-containing diacids (V a-b and VI a-1 ) were prepared by condensation reaction of amino acids, aromatic diamines and trimellitic anhydride. Then, a series of soluble aromatic polyamides (VII a-f ) and poly(amide-imide)s (VIII a-b and IX a-1 ) were synthesized from diamine I with various aromatic diacids (II a-f ) and the imide-containing diacids (V a-b and VI a-1 ) via direct polycondensation with triphenyl phosphate and pyridine. Aromatic polyamides and poly(amide-imide)s had inherent viscosities of 0.60-0.85 dL/g and 0.52-1.44 dL/g, respectively. All synthesized polymers showed excellent solubility in amide-type solvents such as N-methyl-2-pyrrolidinone, N,N-dimethylacetamide (DMAc) and N-dimethylforamide and afford transparent and tough films by DMAc solvent casting. These polymer films had tensile strengths of 87-135 MPa, elongations to break of 8-22%, and initial moduli of 2.0-3.0 GPa. Glass transition temperature of these polymers were in the range of 259-317 °C, and the poly(amide-imide)s had better thermal stability than aromatic polyamides. In comparison with the isomeric X series, the IX series exhibited less coloring and showed a lower b* (yellowness index) values than the corresponding IX series.
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Synthesis and properties of organosoluble poly(amide‐imide)s with propeller‐shaped 1,1,1‐triphenylethane units in the main chain
Journal of Polymer Science Part A: Polymer Chemistry, 2001Co-Authors: Chin-ping Yang, Ruei-shin Chen, Ching-der ChenAbstract:A dicarboxylic acid {1,1-bis[4-(4-trimellitimidophenoxy)phenyl]-1-phenylethane (II)} bearing two performed imide rings was prepared from the condensation of 1,1-bis[4-(4-aminophenoxy)phenyl]-1-phenylethane and trimellitic anhydride in a 1/2 molar ratio. A novel family of poly(amide-imide)s with inherent viscosities of 0.83–1.51 dL/g was prepared by triphenyl phosphite-activated polycondensation from the diimide-diacid II with various aromatic diamines in a medium consisting of N-methyl-2-pyrrolidinone (NMP), pyridine, and calcium chloride. Because the 1,1,1-triphenylethane group of II was unsymmetrical, most of the resulting polymers showed an amorphous nature and were readily soluble in polar solvents such as NMP and N,N-dimethylacetamide. All the soluble poly(amide-imide)s afforded tough, transparent, and flexible films, which had tensile strengths ranging from 88 to 102 MPa, elongations at break from 6 to 11%, and initial moduli from 2.23 to 2.71 GPa. The synthesized poly(amide-imide)s possessed glass-transition temperatures from 250 to 287 °C. The poly(amide-imide)s exhibited excellent thermal stabilities and had 10% weight losses from 501 to 534 °C under a nitrogen atmosphere. A comparative study of some corresponding poly(amide-imide)s is also presented. © 2001 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 39: 775–787, 2001
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Synthesis and properties of poly(amide–imide)s containing a N-methylcarbazole group
Colloid & Polymer Science, 2000Co-Authors: Chin-ping Yang, Ruei-shin Chen, C.-c. ChangAbstract:A new dicarboxylic acid monomer containing the N-methylcarbazole and imide structures, 3,6-bis(trimellitimido)-N-methylcarbazole (I), was prepared from the condensation of 3,6-diamino-N-methylcarbazole (c) and trimellitic anhydride. The diamine c was synthesized in three steps starting from the methylation of carbazole, followed by nitration and catalytic hydrazine reduction. A series of N-methylcarbazole-containing poly(amide–imide)s were synthesized by direct polycondensation from the diimide–diacid I with various aromatic diamines. These poly(amide–imide)s had inherent viscosities of 0.66–1.47 dl/g and were readily soluble in a variety of organic solvents, including N-methyl-2-pyrrolidone and N,N-dimethylacetamide (DMAc). Transparent, flexible, and tough films of these polymers could be cast from DMAc solutions, and these films exhibited excellent mechanical strength. The glass-transition temperatures of these poly(amide–imide)s were in the range 317–362 °C. All the poly (amide–imide) did not degrade noticeably below 480 °C in nitrogen, and the 10% weight loss temperatures and char yields at 800 °C were above 520 °C and 60% in nitrogen, respectively, indicating high thermal stability.
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synthesis and characterization of new aromatic poly amide imide s derived from 1 4 bis 4 aminophenoxy 2 t butylbenzene and various bis trimellitimide s
Materials Chemistry and Physics, 2000Co-Authors: Chin-ping Yang, Sheng-huei Hsiao, Hueiwen YangAbstract:Abstract A series of novel t-butyl group-containing poly(amide–imide)s III a – m were synthesized by the direct polycondensations of 1,4-bis(4-aminophenoxy)-2-t-butylbenzene (BAP-tBB) with various aromatic bis(trimellitimide)s II a – m in N-methyl-2-pyrrolidone (NMP) using triphenyl phosphite and pyridine as condensing agents. Poly(amide–imide)s III having inherent viscosities between 0.67 and 1.77 dl g−1 were obtained in quantitative yields. Most of the resulting polymers were readily soluble in polar solvents such as NMP and N,N-dimethylacetamide. All of the soluble poly(amide–imide)s afforded transparent, flexible, and tough films. The glass transition temperatures of these polymers were in the range of 243–300°C, and the 10% weight loss temperatures were above 490°C in nitrogen. The properties of poly(amide–imide)s III were compared with those of the corresponding poly(amide–imide)s III′ prepared from the bis(trimellitimide) of BAP-tBB and various aromatic diamines.
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Preparation and properties of new poly(amide-imide)s based on 1,4-bis(4-trimellitimidophenoxy)naphthalene and aromatic diamines
Journal of Polymer Science Part A: Polymer Chemistry, 2000Co-Authors: Chin-ping Yang, Ruei-shin Chen, Jhy-an ChenAbstract:A diimide dicarboxylic acid, 1,4-bis(4-trimellitimidophenoxy)naphthalene (1,4-BTMPN), was prepared by condensation of 1,4-bis(4-aminophenoxy)naphthalene and trimellitic anhydride at a 1 : 2 molar ratio. A series of novel poly(amide-imide)s (IIa–k) with inherent viscosities of 0.72 to 1.59 dL/g were prepared by triphenyl phosphite-activated polycondensation from the diimide-diacid 1,4-BTMPN with various aromatic diamines (Ia–k) in a medium consisting of N-methyl-2-pyrrolidinone (NMP), pyridine, and calcium chloride. The poly(amide-imide)s showed good solubility in NMP, N,N-dimethylacetamide, and N,N-dimethylformamide. The thermal properties of the obtained poly(amide-imide)s were examined with differential scanning calorimetry and thermogravimetry analysis. The synthesized poly(amide-imide)s possessed glass-transition temperatures in the range of 215 to 263°C. The poly(amide-imide)s exhibited excellent thermal stabilities and had 10% weight losses at temperatures in the range of 538 to 569°C under a nitrogen atmosphere. A comparative study of some corresponding poly(amide-imide)s also is presented. © 2000 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 38: 1–8, 2000
Sheng-huei Hsiao - One of the best experts on this subject based on the ideXlab platform.
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Synthesis and properties of novel organosoluble and light-colored poly(ester-amide)s and poly(ester-imide)s with triptycene moiety
Journal of Polymer Research, 2018Co-Authors: Sheng-huei Hsiao, Yu-chuan LiaoAbstract:Two series of new triptycene-containing poly(ester-amide)s and poly(ester-imide)s were prepared from 1,4-bis(3-aminobenzoyloxy)triptycene with various aromatic dicarboxylic acids and dianhydrides, respectively. The synthesis of the poly(ester-amide)s was achieved by the phosphorylation polyamidation reaction by means of triphenyl phosphite and pyridine, and the synthesis of the poly(ester-imide)s included ring-opening polyaddition to give poly(amic acid)s followed by thermal imidization and chemical imidization to polyimides. All the poly(ester-amide)s and most of the poly(ester-imide)s presented good solubility in many organic solvents and could be solution-cast into transparent and flexible films. These poly(ester-amide)s and poly(ester-imide)s displayed discernible glass-transition temperatures (Tgs) between 242 and 298 °C in the DSC traces and showed moderate thermal stability with 10 wt% loss temperatures above 464 °C in nitrogen or air. These highly optically transparent polymer films possess an ultraviolet-visible absorption cut-off wavelength (λ0) down to 344 nm. 1,4-Bis(4-aminobenzoyloxy)triptycene was also synthesized and used for polymer synthesis; however, less favorable results were obtained.
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synthesis and characterization of new aromatic poly amide imide s derived from 1 4 bis 4 aminophenoxy 2 t butylbenzene and various bis trimellitimide s
Materials Chemistry and Physics, 2000Co-Authors: Chin-ping Yang, Sheng-huei Hsiao, Hueiwen YangAbstract:Abstract A series of novel t-butyl group-containing poly(amide–imide)s III a – m were synthesized by the direct polycondensations of 1,4-bis(4-aminophenoxy)-2-t-butylbenzene (BAP-tBB) with various aromatic bis(trimellitimide)s II a – m in N-methyl-2-pyrrolidone (NMP) using triphenyl phosphite and pyridine as condensing agents. Poly(amide–imide)s III having inherent viscosities between 0.67 and 1.77 dl g−1 were obtained in quantitative yields. Most of the resulting polymers were readily soluble in polar solvents such as NMP and N,N-dimethylacetamide. All of the soluble poly(amide–imide)s afforded transparent, flexible, and tough films. The glass transition temperatures of these polymers were in the range of 243–300°C, and the 10% weight loss temperatures were above 490°C in nitrogen. The properties of poly(amide–imide)s III were compared with those of the corresponding poly(amide–imide)s III′ prepared from the bis(trimellitimide) of BAP-tBB and various aromatic diamines.
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Synthesis and Properties of Poly(Amide-Imide-Hydrazide)s and Poly(Amide-Imide-1,3,4-Oxadiazole)s
High Performance Polymers, 2000Co-Authors: Sheng-huei Hsiao, Li-min ChangAbstract:A series of new wholly aromatic and aromatic-aliphatic poly(amide-imide-hydrazide)s were prepared by the direct polycondensation from p-aminobenzhydrazide with various imide ring-containing dicarboxylic acids by means of diphenyl phosphite and pyridine. These polymers had inherent viscosities between 0.60 and 1.17 dl g−1. Most of the poly(amide-imide-hydrazide)s were readily soluble in polar aprotic solvents such as N-methyl-2-pyrrolidone (NMP) and dimethyl sulfoxide (DMSO) and could be solution cast into light yellow, transparent, flexible, and tough films. These poly(amide-imide-hydrazide)s had Tg in the range 122–211 °C and could be thermally cyclodehydrated in the solid state to the corresponding poly(amide-imide-1,3,4-oxadiazole)s approximately in the range 250–400 °C, as evidenced by the differential scanning calorimetry thermograms. The thermally converted oxadiazole copolymers exhibited Tg in the range 120–271 °C and did not show significant weight loss before 380 °C in air or nitrogen. Effects of...
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Synthesis and characterization of new aromatic poly(amide–imide)s derived from 1,4-bis(4-aminophenoxy)-2-t-butylbenzene and various bis(trimellitimide)s
Materials Chemistry and Physics, 2000Co-Authors: Chin-ping Yang, Sheng-huei Hsiao, Hueiwen YangAbstract:Abstract A series of novel t-butyl group-containing poly(amide–imide)s III a – m were synthesized by the direct polycondensations of 1,4-bis(4-aminophenoxy)-2-t-butylbenzene (BAP-tBB) with various aromatic bis(trimellitimide)s II a – m in N-methyl-2-pyrrolidone (NMP) using triphenyl phosphite and pyridine as condensing agents. Poly(amide–imide)s III having inherent viscosities between 0.67 and 1.77 dl g−1 were obtained in quantitative yields. Most of the resulting polymers were readily soluble in polar solvents such as NMP and N,N-dimethylacetamide. All of the soluble poly(amide–imide)s afforded transparent, flexible, and tough films. The glass transition temperatures of these polymers were in the range of 243–300°C, and the 10% weight loss temperatures were above 490°C in nitrogen. The properties of poly(amide–imide)s III were compared with those of the corresponding poly(amide–imide)s III′ prepared from the bis(trimellitimide) of BAP-tBB and various aromatic diamines.
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New poly(amide–imide)s syntheses. XXIII. Synthesis and properties of poly(amide–imide)s derived from 4,4′-[1,4-phenylenebis(isopropylidene-1,4-phenyleneoxy)]dianiline and various bis(trimellitimide)s
Journal of Polymer Science Part A: Polymer Chemistry, 1999Co-Authors: Chin-ping Yang, Sheng-huei Hsiao, Hsiu-chun HsiaoAbstract:A series of poly(amide–imide)s IIIa–m containing flexible isopropylidene and ether groups in the backbone were synthesized by the direct polycondensation of 4,4′-[1,4-phenylenebis(isopropylidene-1,4-phenyleneoxy)]dianiline (PIDA) with various bis(trimellitimide)s IIa–m in N-methyl-2-pyrrolidone (NMP) using triphenyl phosphite and pyridine as condensing agents. The resulting poly(amide–imide)s had inherent viscosities in the range of 0.80–1.36 dL/g. Except for those from the bis(trimellitimide)s of p-phenylenediamine and benzidine, all the polymers could be cast from DMAc into transparent and tough films. They exhibited excellent solubility in polar solvents. The 10% weight loss temperatures of the polymers in air and in nitrogen were all above 495°C, and their Tg values were in the range of 201–252°C. Some properties of poly(amide–imide)s III were compared with those of the corresponding poly(amide–imide)s V prepared from the bis(trimellitimide) of diamine PIDA and various aromatic diamines. © 1999 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 37: 69–76, 1999
Jiun-hung Lin - One of the best experts on this subject based on the ideXlab platform.
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New poly(amide‐imide)s syntheses. XVII. Preparation and properties of poly(amide‐imide)s derived from 3,3‐Bis[4‐(4‐aminophenoxy)phenyl]phthalimidine and various bis(trimellitimide)s
Journal of Polymer Science Part A, 1996Co-Authors: Chin-ping Yang, Jiun-hung LinAbstract:Fifteen bis(phenoxy) fluorene-containing poly(amide-imide)s III were synthesized by the direct polycondensation of 9,9-bis[4-(4-aminophenoxy)phenyl]fluorene (BAPPF) with var-ious aromatic bis(trimellitimide)s II in N-methyl-2-pyrrolidone (NMP) using triphenyl phosphite and pyridine as condensing agents. Poly(amide-imide)s III having inherent vis-cosities up to 1.45 dL/g were obtained in quantitative yields. Most of the resulting polymers showed an amorphous nature and were readily soluble in polar solvents such as NMP and N,N-dimethylacetamide. All the soluble poly(amide-imide)s afforded transparent, flexible, and tough films. The glass transition temperatures of these polymers were in the range of 263–315°C and the 10% weight loss temperatures were above 510°C in nitrogen. Some properties of poly(amide-imide)s III were compared with those of the corresponding isomeric poly(amide-imide)s III′ prepared from 9,9-[4-(4-trimellitimidophenoxy)phenyl]fluorene and various aromatic diamines. © 1995 John Wiley & Sons, Inc.
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New poly(amide‐imide) syntheses, 19. Preparation and properties of poly(amide‐imide)s derived from N‐phenyl‐3,3‐bis[4‐(4‐aminophenoxy)phenyl]‐1‐oxoisoindoline and various bis(trimellitimide)s
Macromolecular Chemistry and Physics, 1996Co-Authors: Jiun-hung Lin, Chin-ping YangAbstract:A series of novel bis(phenoxy)-1-oxoisoindoline-containing poly(amide-imide)s 3 were synthesized by the direct polycondensations of N-phenyl-3,3-bis[4-(4-aminophenoxy)-phenyl]-1-oxoisoindoline (1m, NPBA) with various aromatic bis(trimellitimide)s 2 in N-methyl-2-pyrrolidone (NMP) using triphenyl phosphite and pyridine as condensing agents. Poly(amide-imide)s 3 having inherent viscosities up to 1,06 dL/g were obtained in quantitative yields. Most of the resulting polymers showed an amorphous nature and were readily soluble in polar solvents such as NMP and N,N-dimethylacetamide. All of the soluble poly(amide-imide)s afforded transparent, flexible, and tough films. The glass transition temperatures of these polymers were in the range of 277-327 °C, and the 10% weight loss temperatures were above 500°C in nitrogen. The properties of poly(amideimide)s 3 were compared with those of the corresponding isomeric poly(amide-imide)s 3' prepared from NPBA and various aromatic diamines.
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New poly(amide‐imide)s synthesis, 16. Preparation and properties of poly(amide‐imide)s derived from 3,3‐bis[4‐(4‐aminophenoxy) phenyl]phthalide and various bis(trimellitimide)s
Macromolecular Chemistry and Physics, 1995Co-Authors: Cnin-ping Yang, Jiun-hung LinAbstract:A series of novel bis(phenoxy)phthalide-containing poly(amide-imide)s 3 were synthesized via direct polycondensation of 3,3-bis[4-(4-aminophenoxy)phenyl]phthalide (BAPP) with various aromatic bis(trimellitimide)s 2 in N-methyl-2-pyrrolidone (NMP) using triphenyl phosphite and pyridine as condensing agents. Poly(amide-imide)s 3 having inherent viscosities up to 1,68 dL/g were obtained in quantitative yields. Most of the resulting polymers showed an amorphous nature and were readily soluble in polar solvents such as NMP and N,N-dimethylacetamide. All the soluble poly(amide-imide)s afforded transparent, flexible, and tough films. The glass transition temperatures of these polymers were in the range of 237–292°C and the 10% weight loss temperatures were above 500°C in nitrogen. The properties of poly(amide-imide)s 3 were compared with those of the corresponding isomeric poly(amide-imide)s 3′ prepared from 3,3-[4-(4-trimellitimido-phenoxy)phenyl]-phthalide and various aromatic diamines.
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New poly(amide‐imide)s syntheses, 14. Preparation and properties of poly(amide‐imide)s based on 3, 3‐bis[4‐(4‐trimellitimidophenoxy)phenyl]‐1‐oxoisoindoline
Macromolecular Chemistry and Physics, 1995Co-Authors: Chin-ping Yang, Jiun-hung LinAbstract:An imide ring-containing dicarboxylic acid, 3,3-bis[4-(4-trimellitimidophenoxy)phenyl]-1-oxoisoindoline, was prepared via condensation of 3,3-bis[4-(4-aminophenoxy)phenyl]-1-oxoisoindoline and trimellitic anhydride. A series of new aromatic bis(phenoxy)-1-oxoisoindoline-containing poly(amide-imide)s were prepared via direct polycondensation of this diimide-diacid with various aromatic diamines using triphenyl phosphite and pyridine as condensing agents in N-methyl-2-pyrrolidone (NMP) in the presence of calcium chloride. Most of the resulting polymers are of amorphous nature and readily soluble in polar solvents such as NMP and N,N-dimethylacetamide. All soluble poly(amide-imide)s afford transparent, flexible, and tough films. The glass transition temperatures of the polymers are in the range of 267 - 305 °C and show almost no weight loss up to 450 °C in nitrogen atmosphere. The properties of 1-oxoisoindoline containing poly(amide-imide)s are compared with those of the corresponding analogous poly(amide-imide)s derived from 3,3-bis[4-(4-trimellitimidophenoxy)phenyl]phthalide.
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New poly(amide-imide) syntheses, 4 Poly(amide-imide)s derived from 2,5-bis(4-aminophenyl)-3,4-diphenylthiophene and various bis(trimellitimide)s†
Die Makromolekulare Chemie, 1992Co-Authors: Chin-ping Yang, Sheng-huei Hsiao, Jiun-hung LinAbstract:Fifteen bis(trimellitimide)s 2a–o were prepared by condensation of the corresponding aliphatic or aromatic diamines with trimellitic anhydride. A series of structurally new poly(amideimide)s were synthesized by the direct polycondensation of these bis(strimellitimide)s with 2,5-bis(4-aminophenyl)-3,4-diphenylthiophene using triphenyl phosphite and pyridine as condensing agents in N-methyl-2-pyrrolidone (NMP). The resultant poly(amide-imide)s have inherent viscosities in the range between 0,72 and 2,73 dL/g at 30°C in N,N-dimethylacetamide (cf. Tab. 2). The polymers are amorphous and readily soluble in polar aprotic solvents such as N,N-dimethylacetamide (DMAc) and NMP. Transparent and tough films can be cast from their solutions. Most aliphatic-aromatic poly(amide-imide)s show a glass transition in the range between 203 and 242°C in their differential scanning calorimetry (DSC) traces, whereas the wholly aromatic poly(amide-imide)s show no discernible transition before decomposition. The thermal stability of the polymers was evaluated by thermogravimetry which showed the 10% weight-loss temperatures in the range between 414 and 459°C in air and between 451 and 578°C in a nitrogen atmosphere for the aliphatic-aromatic poly(amide-imide)s and above 500°C in both air and nitrogen atmosphere for the wholly aromatic poly(amide-imide)s.
Khalil Faghihi - One of the best experts on this subject based on the ideXlab platform.
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New Poly(amide-imide)/Nanocomposites Reinforced Silicate Nanoparticles Based on N-pyromellitimido-L-phenyl Alanine Containing Ether Moieties
High Temperature Materials and Processes, 2012Co-Authors: Khalil Faghihi, Meisam Shabanian, Ehsan DadfarAbstract:AbstractA series of Poly(amide-imide)/montmorillonite nanocomposites containing
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New Poly(Amide-Imide)s Based on 1,3-Bis[4,4′-(Trimellitimido) Phenoxy] Propane and Hydantoin Derivatives: Synthesis and Properties
Designed Monomers and Polymers, 2011Co-Authors: Khalil Faghihi, Meisam Shabanian, Nasim ValikhaniAbstract:1,3-Bis[4,4′-(trimellitimido) phenoxy] propane (6) as a new monomer containing a trimethylene moiety was synthesized using a three-step reaction. First 1,3-bis[4,4′-nitrophenoxy] propane (3) was prepared by reaction of 4-nitrophenol 1 with 1,3-dibromo propane (2) in DMF. Then dinitro (3) was reduced to 1,3-bis[4,4′-aminophenoxy] propane (4) using a solution of sodium sulfite in ethanol. Finally, monomer (6) was prepared by reaction of one equivalent diamine (4) with two equivalents of trimellitic anhydride (5) in a mixture of acetic acid and pyridine (3:2). Then six new poly(amide-imide)s (8a – f) were synthesized through the polycondensation reaction of diacid (6) with six different derivatives of hydantoin (7a – f) in N-methyl-2-pyrrolidone, using triphenylphosphite and pyridine as condensing agents. The polycondensation produced a series of novel poly(amide-imide)s in high yields with inherent viscosities between 0.31 and 0.61 dl/g. The resulting poly(amide-imide)s were characterized by elemental analy...
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Synthesis and characterization of optically active poly(amide-imide)s containing photosensitive chalcone units in the main chain
Chinese Journal of Polymer Science, 2010Co-Authors: Khalil Faghihi, Hassan MoghanianAbstract:A series of new optically active poly(amide-imide)s were synthesized by direct polycondensation reaction of 4,4′-diaminochalcone with several N -trimellitylimido-L-amino acids using a tosyl chloride (TsCl), pyridine (Py) and dimethylformamide (DMF) system as condensing agent. The resulting thermally stable poly(amide-imide)s were obtained in good to high yields and inherent viscosities ranging between 0.35 dL/g and 0.58 dL/g and were characterized with FTIR, 1H-NMR, CHN, Ultraviolet, TGA and DTG techniques.
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New optically active poly(amide-imide)s derived from N,N′-(4,4-diphthaloyl)-bis-l-leucine and hydantoin derivatives: Synthesis and properties
Chinese Chemical Letters, 2009Co-Authors: Khalil FaghihiAbstract:Abstract Six new optically active poly(amide-imide)s (5a–f) were synthesized through the direct polycondensation reaction of N,N′-(4,4′-diphthaloyl)-bis- l -leucine (3) with six hydantoin derivatives (4a–f). Triphenyl phosphite (TPP)/pyridine in the presence of calcium chloride (CaCl2) and N-methyl-2-pyrrolidone (NMP) were successfully applied for direct polycondensation. The polycondensation reactions produce a series of new poly(amide-imide)s (5a–f) in high yields, and inherent viscosity between 0.42 and 0.55 dL/g. The resulting poly(amide-imide)s (5a–f) were characterized by elemental analysis, viscosity measurements, thermal gravimetric analysis (TGA and DTG), solubility test and FT-IR spectroscopy.
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New poly(amide imide)s containing bis(4‐trimellitimidophenyl) sulfone and hydantoin moieties in the main chain: Synthesis and properties
Journal of Applied Polymer Science, 2005Co-Authors: Khalil Faghihi, Howra NaghaviAbstract:Several new poly(amide imide)s were synthesized through the polycondensation reactions of bis(4-trimellitimidophenyl) sulfone [N,N′-(4,4′-diphenylsulfone) bistrimellitimide] with a number of hydantoin derivatives in a medium consisting of thionyl chloride, N-methyl-2-pyrrolidone, and pyridine. The polycondensations produced a series of novel poly(amide imide)s in high yields with inherent viscosities of 0.20–0.46 dL/g. The resulting poly(amide imide)s were characterized with elemental analysis, viscosity measurements, thermogravimetric analysis, derivative thermogravimetry, solubility testing, and Fourier transform infrared spectroscopy. All the polymers were soluble at room temperature in polar solvents such as N,N-dimethylacetamide, N,N-dimethylformamide, dimethyl sulfoxide, tetrahydrofuran, and N-methyl-2-pyrrolidone. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 96: 1776–1782, 2005
Hueiwen Yang - One of the best experts on this subject based on the ideXlab platform.
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synthesis and characterization of new aromatic poly amide imide s derived from 1 4 bis 4 aminophenoxy 2 t butylbenzene and various bis trimellitimide s
Materials Chemistry and Physics, 2000Co-Authors: Chin-ping Yang, Sheng-huei Hsiao, Hueiwen YangAbstract:Abstract A series of novel t-butyl group-containing poly(amide–imide)s III a – m were synthesized by the direct polycondensations of 1,4-bis(4-aminophenoxy)-2-t-butylbenzene (BAP-tBB) with various aromatic bis(trimellitimide)s II a – m in N-methyl-2-pyrrolidone (NMP) using triphenyl phosphite and pyridine as condensing agents. Poly(amide–imide)s III having inherent viscosities between 0.67 and 1.77 dl g−1 were obtained in quantitative yields. Most of the resulting polymers were readily soluble in polar solvents such as NMP and N,N-dimethylacetamide. All of the soluble poly(amide–imide)s afforded transparent, flexible, and tough films. The glass transition temperatures of these polymers were in the range of 243–300°C, and the 10% weight loss temperatures were above 490°C in nitrogen. The properties of poly(amide–imide)s III were compared with those of the corresponding poly(amide–imide)s III′ prepared from the bis(trimellitimide) of BAP-tBB and various aromatic diamines.
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Synthesis and characterization of new aromatic poly(amide–imide)s derived from 1,4-bis(4-aminophenoxy)-2-t-butylbenzene and various bis(trimellitimide)s
Materials Chemistry and Physics, 2000Co-Authors: Chin-ping Yang, Sheng-huei Hsiao, Hueiwen YangAbstract:Abstract A series of novel t-butyl group-containing poly(amide–imide)s III a – m were synthesized by the direct polycondensations of 1,4-bis(4-aminophenoxy)-2-t-butylbenzene (BAP-tBB) with various aromatic bis(trimellitimide)s II a – m in N-methyl-2-pyrrolidone (NMP) using triphenyl phosphite and pyridine as condensing agents. Poly(amide–imide)s III having inherent viscosities between 0.67 and 1.77 dl g−1 were obtained in quantitative yields. Most of the resulting polymers were readily soluble in polar solvents such as NMP and N,N-dimethylacetamide. All of the soluble poly(amide–imide)s afforded transparent, flexible, and tough films. The glass transition temperatures of these polymers were in the range of 243–300°C, and the 10% weight loss temperatures were above 490°C in nitrogen. The properties of poly(amide–imide)s III were compared with those of the corresponding poly(amide–imide)s III′ prepared from the bis(trimellitimide) of BAP-tBB and various aromatic diamines.