PREPARATION OF NEW OPTICALLY ACTIVE AND THERMALLY STABLE POLY(AMIDE-IMIDE) CONTAINING BICYCLO SEGMENT AND ETHER GROUP IN THE MAIN CHAIN BY DIRECT POLYCONDENSATION IN TWO DIFFERENT MEDIA
作者:KHALIL FAGHIHI、MEISAM SHABANIAN
DOI:10.4067/s0717-97072010000400018
日期:——
A new series of optically active and thermally stable poly(amide-imide)s (PAIs) with good inherent viscosities based on bicyclo diacids and etheric diamine in the main chain were synthesized from the direct polycondensation reaction of N,N΄-(bicyclo[2,2,2]oct-7-ene-tetracarboxylic)-bis-l-amino acids 3a-g with 1,2-Bis[4-aminophenoxy]ethane 7 by direct polycondensatios with two different media such as
由N,N΄-(bicyclo [通过1,2-双[4-氨基苯氧基]乙烷7与1,2-双[4-氨基苯氧基]乙烷7的2,2,2] oct-7-烯-四羧酸)-双-1-氨基酸3a-g通过两种不同介质的直接缩合,例如在介质由正甲基-2-吡咯烷酮(NMP)/亚磷酸三苯酯(TPP)/氯化钙(CaCl 2)/吡啶(Py)组成,并在甲苯磺酰氯(TsCl)/吡啶(Py)/ n,n-二甲基甲酰胺(DMF)中直接缩聚) 系统。通过双环[2,2,2] oct-7-ene-2,3,5,6-四羧酸二酐1与两个等摩尔的各种氨基酸(例如1-丙氨酸2a)的缩合反应,也可以合成3a-g。缬氨酸2b 在乙酸溶液中的l-亮氨酸2c,l-异亮氨酸2d,l-苯丙氨酸2e,l-2-氨基丁酸2f和l-组氨酸2g。聚合反应产生了一系列热稳定和光学活性的有机可溶性PAI。所得聚合物通过FT-IR和1H-NMR光谱,元素分析,比浓对数粘度,比旋光度