Novel polyimides derived from 2,3,3′,4′-benzophenonetetracarboxylic dianhydride

A series of polyimides (PIs) based on 2,3,3′,4′-benzophenonetetracarboxylic dianhydride (2,3,3′,4′-BTDA) and 3,3′,4,4′-BTDA were prepared by the conventional two-step process. The properties of the 2,3,3′,4′-BTDA based polyimides were compared with those of polyimides prepared from 3,3′,4,4′-BTDA. I...

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Bibliographic Details
Published in:Polymer (Guilford) 2003-04, Vol.44 (9), p.2641-2646
Main Authors: Fang, Xingzhong, Wang, Zhen, Yang, Zhenghua, Gao, Lianxun, Li, Qingxuan, Ding, Mengxian
Format: Article
Language:English
Subjects:
2,3,3′,4′-BTDA
Applied sciences
Exact sciences and technology
Isomeric polyimides
Organic polymers
Physicochemistry of polymers
Polycondensation
Preparation, kinetics, thermodynamics, mechanism and catalysts
Structure–property relations
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Summary:A series of polyimides (PIs) based on 2,3,3′,4′-benzophenonetetracarboxylic dianhydride (2,3,3′,4′-BTDA) and 3,3′,4,4′-BTDA were prepared by the conventional two-step process. The properties of the 2,3,3′,4′-BTDA based polyimides were compared with those of polyimides prepared from 3,3′,4,4′-BTDA. It was found that PIs from 2,3,3′,4′-BTDA have higher glass transition temperature and better solubility without sacrificing their thermal properties. Furthermore the rheological properties of PMR-15 type polyimide resins based on 2,3,3′,4′-BTDA showed lower melt viscosity and wider melt flow region (flow window) compared with those from 3,3′,4,4′-BTDA. The structure–property relations resulted from isomerism were discussed.
ISSN:0032-3861
1873-2291
DOI:10.1016/S0032-3861(03)00181-2