Citation: Yue Jin TONG, Yan Xiang CHENG, Meng Xian DING, Yan XING, Yong Hua LIN. Polyimide structure-Property Relationships I. Polyimide Properties vs Dianhydride Configuration[J]. Chinese Chemical Letters, ;1998, 9(10): 971-972. shu

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

Changchun institute of Applied Chemistry, Academia Sinica, Changchun 130022

Received Date: 29 May 1998

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 glass transition temperature (T_g) compared with those from 3,3',4,4'-BPDA.
- polytimide,
- dianhydride isomers,
- x-ray single-crystal structure,
- structure-property
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