Polyimide structure-Property Relationships I. Polyimide Properties υs Dianhydride Configuration

被引：1
|
作者：
Yue Jin TONG
Yan Xiang CHENG
Meng Xian DING
Yan XING
Yong Hua LIN (Changchun institute of Applied Chemistry
机构：
来源：
Chinese Chemical Letters | 1998年 / 10期
关键词：
polytimide; dianhydride isomers; x-ray single-crystal structure; structure-property;
D O I：
暂无
中图分类号：
O633 [杂链聚合物];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
X-ray crystal structures of 2,2’,3,3’-and 3, 3’,4,4’-biphenyltetracarboxylic dianhydride (2,2’,3,3’- and 3,3’,4,4’-BPDA) were determined. The dianhydride isomers have different symmetry caused by difference in two anhydride group positions and the dihedral angles between the two phenyl rings are 62.9°for 2,2’,3,3’,-BPDA and 0°for 3,3’,4,4’-BPDA respectively. The polyimides from 2,2’,3,3’-BPDA exhibit enhanced solubility, higher thermal stability, and higher glasstransition temperature (Tg) compared with those from 3,3’,4,4’-BPDA.
引用
收藏
页码：971 / 972
页数：2
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