Synthesis of aromatic polyamides from oligocarbodiimides and isophthalic acid

被引：1
|
作者：
Schotman, AHM [1 ]
Weber, TJM [1 ]
Mijs, WJ [1 ]
机构：
[1] Akzo Corp Res, Cent Res, NL-6800 SB Arnhem, Netherlands
来源：
MACROMOLECULAR CHEMISTRY AND PHYSICS | 1999年 / 200卷 / 03期
关键词：
D O I：
10.1002/(SICI)1521-3935(19990301)200:3<635::AID-MACP635>3.0.CO;2-0
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
A new method to synthesize aromatic polyamides from oligocarbodiimides (derived from toluenediisocyanate (TDI) and 4,4'-diphenylmethanediisocyanate (MDI)) in N-methyl-2-pyrrolidone (NMP) as a solvent is described. Molar masses, based on end-group analysis and size exclusion chromatography, are in the order of 15 000-20 000 ((M) over bar(a)). Chemical structures of the polyamides were firmly established by means of NMR using CH-correlation techniques. The polymers are amorphous, with T-g's from 250-268 degrees C, dependent on the TDI/MDI ratio. Thermal stability (weight loss onset around 400 degrees C according to TGA measurements) suggests that melt processing may be feasible.
引用
收藏
页码：635 / 641
页数：7
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