引用本文:
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.
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.
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.
Polyimide structure-Property Relationships I. Polyimide Properties vs Dianhydride Configuration
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 glass transition temperature (Tg) compared with those from 3,3',4,4'-BPDA.
English
Polyimide structure-Property Relationships I. Polyimide Properties vs Dianhydride Configuration
Abstract:
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 (Tg) compared with those from 3,3',4,4'-BPDA.
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Key words:
- polytimide
- / dianhydride isomers
- / x-ray single-crystal structure
- / structure-property
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