Synthesis and properties of poly(amide-imide-urethane) thermoplastic elastomers

✍ Scribed by Wang, Tzong-Liu; Huang, Fang-Jung

• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: English
• Weight: 194 KB
• Volume: 46
• Category: Article
• ISSN: 0959-8103
• DOI: 10.1002/(sici)1097-0126(199808)46:4<280::aid-pi992>3.0.co;2-#

✦ Synopsis

A new class of poly(amide-imide-urethane) thermoplastic elastomers based on two-step synthesis of 4,4@-methylene bis(4-phenylisocyanate) with di †erent polyols (PPG and PTMG) and trimellitic anhydride was synthesized. Both resulting polymers showed semicrystalline structures and were readily soluble in polar solvents such as N-methyl-2-pyrrolidone and dimethyl formamide. The soluble poly(amide-imide-urethane)s a †orded transparent, Ñexible, and tough Ðlms. Both new copolymers were then characterized by FTIR spectroscopy, universal tensile tester, simultaneous DTA/TGA (SDT), di †erential scanning calorimetry (DSC), and wide-angle X-ray di †raction studies, to determine their morphological structures, thermal stability, and mechanical properties. Compared to typical polyurethanes, these polymers exhibited better thermal stabilities due to the presence of imide groups. DSC and X-ray di †raction studies showed semicrystalline patterns for these polymers. StressÈstrain properties revealed that these polymers have good extensibility like typical polyurethanes.

1998 SCI.