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New optically active poly(amide-imide)s based on N,N′-(pyromellitoyl)-bis-L-amino acid and methylene diphenyl-4,4′-diisocyanate: synthesis and characterization

✍ Scribed by Tian, Xiao-yu; Yao, Jinshui; Zhang, Xian; Li, Mei; Liu, Weiliang; Qiao, Congde; Yu, Donghong


Book ID
125846938
Publisher
Taylor and Francis Group
Year
2013
Tongue
English
Weight
263 KB
Volume
17
Category
Article
ISSN
1385-772X

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New optically active poly(amide-imide)s
✍ Khalil Faghihi 📂 Article 📅 2008 🏛 John Wiley and Sons 🌐 English ⚖ 368 KB 👁 2 views

## Abstract Five new poly(amide‐imide)s **8a–e** were synthesized through the direct polycondensation reaction of five chiral __N__,__N__′‐(pyromellitoyl)‐bis‐L‐amino acids **3a–e** with 1,3‐bis(4‐aminophenoxy) propane **7** in a medium consisting of __N__‐methyl‐2‐pyrrolidone, triphenyl phosfite,