High Glass Transitions of New Polyamides, Polyimides, and Poly(amide−imide)s Containing a Triphenylamine Group: Synthesis and Characterization
作者:Der-Jang Liaw、Pei-Nan Hsu、Wen-Hsiang Chen、Shu-Ling Lin
DOI:10.1021/ma001523u
日期:2002.6.1
new triphenylamine-containing dicarboxylic acid monomer, 4,4‘-trimellitimido-3‘ ‘,4‘ ‘-dimethyltriphenylamine (TDT), was successfully synthesized by refluxing the diamine, DADT, with trimellitic anhydride in glacial acetic anhydride. A series of new poly(amide−imide)s were prepared from TDT with various diamines by the direct polycondensation. The polymers were obtained in quantitative yields with inherent
通过氟化铯介导的3,4-二甲基苯胺与4-氟硝基苯的缩合反应成功合成了一种新的含三苯胺的二胺单体4,4'-二氨基-3'',4'-二甲基三苯胺(DADT)。通过减少。该单体与各种芳族二羧酸和四羧酸二酐反应,分别制得一系列新的聚酰胺和聚酰亚胺。一种新的含三苯胺的二羧酸单体,4,4'-trimellitimido-3',, 4'-二甲基三苯胺(TDT)通过将二胺DADT与偏苯三酸酐在冰醋酸乙酸酐中回流而成功合成。由TDT与各种二胺通过直接缩聚反应制备了一系列新的聚(酰胺-酰亚胺)。以定量收率获得聚合物,固有粘度为0.61-2.28 dL g-1。大部分聚合物溶于N-甲基-2-吡咯烷酮,N,N-二甲基乙酰胺,N,N-二甲基甲酰胺,二甲基亚砜,吡啶和环己酮。这些聚合物,特别是聚(酰胺-酰亚胺),在254至326°C之间表现出高玻璃化转变温度。这些聚合物在大约400°C或更高的温度下相当稳定,并且在氮气