Korean Membrane Journal
- Volume 3 Issue 1
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- Pages.9-16
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- 2001
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- 1229-6791(pISSN)
Synthesis and Characterization of Copoly(amide-imide) Derivatives and Ultrafiltration Membrane Performances I - Preparation of Copoly(amide-imide)s by One-step Method -
- Jeon, Jong-young (Department of Textile Engineering Sangju National University) ;
- Shin, Bong-Seob (Department of Textile Engineering Sangju National University)
- Published : 2001.12.01
Abstract
The diamide-diamine having carboxylic acid was prepared by direct condensation of 1,2,4-benzenetricarboxylic acid with bits[4- (3-aminophenoxy ) phenyl] sulfone and bits(4-aminouhenyl)-1,4- diisopropylbenzene in medium consisting of triphenylphosphite, LiCl, and N-methyl-2-pyrrolidone. Copoly (amide-imide) derivatives with high molecular weight could be synthesized by one-step polycondensation of prepared diamide-diamine having carboxylic acid and various dianhydride compounds. Depending on the chemical structure and composition of polymer backbones, the viscosities of polymers were found to range between 0.87∼ 1.57 dL/B. All the polymers showed good thermal stability up to 320