Synthesis and properties of novel aromatic hyperbranched polyamide prepared by direct polycondensation

被引：15

作者：

Yang, G ^{[1
]}

Jikei, M ^{[1
]}

Kakimoto, M ^{[1
]}

机构：

[1] Tokyo Inst Technol, Dept Organ & Polymer Mat, Meguro Ku, Tokyo 1528552, Japan

来源：

PROCEEDINGS OF THE JAPAN ACADEMY SERIES B-PHYSICAL AND BIOLOGICAL SCIENCES | 1998年 / 74卷 / 08期

关键词：

hyperbranched polymer; aromatic polyamide; direct polycondensation; degree of branching;

D O I：

10.2183/pjab.74.188

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

An aromatic hyperbranched polyamide was synthesized by the direct polycondensation of an AB(2) type monomer (3,5-bis(4-aminophenoxy)benzoic acid) in NMP in the presence of triphenyl phosphite and pyridine as condensing agents. Structure of the monomer and the resulting polymer was identified by IR, H-1-NMR, and C-13-NMR measurements. The polymer was soluble in DMF, DMAc, NMP, DMSO, m-cresol and 2-methoxyethanol. Degree of branching of the polymer was determined as 48% by the integration ratio in the C-13- NMR spectrum. The glass transition temperature (T-g) was observed at 200 degrees C in DSC measurement. The onset temperature (T-0) and the temperature of 10% weight loss (T-10) were determined as 310 degrees C and 530 degrees C, respectively, in TGA measurement.

引用

页码：188 / 191

页数：4

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