- Synthesis and characterization of phthalazinone poly(aryl ether sulfone ketone) with carbonyl group
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- 论文类型： 期刊论文
- 发表时间： 2002-05-01
- 发表刊物： CHINESE JOURNAL OF POLYMER SCIENCE
- 收录刊物： SCIE、CSCD
- 卷号： 20
- 期号： 3
- 页面范围： 225-229
- ISSN号： 0256-7679
- 关键字： poly(aryl ether sulfone ketone); synthesis; active pendant group
- 摘要： A kind of novel heat-resistant, high performance engineering thermoplastic phthalazinone poly(aryl ether sulfone ketone) (PPESK) containing a carboxyl group in its side chain was prepared by the nucleophilic displacement reaction of 4-(4-hydroxylphenyl)- 1 (2H)-phthalazinone with di(4-chlorophenyl) sulfone, 4,4'-difluoro-benzophenone and phenolphthalin in sulfolane in the presence of K2CO3 to produce high molecular weight polymers which can be dissolved in some polar solvents such as chloroform and nitrobenzene at room temperature and can be easily cast into flexible, yellowish and transparent films. PPESK is an amorphous polymer having a decomposition temperature above 400degreesC, which indicates that it has high thermal stability. At the same time, the thermal properties of PPESKs with dicyandiamide (DICY) as curing agent indicated that the heat-resistance properties of the PPESKs are improved after curing. The apparent activation energy (A-E) of the cross-linking reaction and the reaction order (n) of PPESK/DICY were found to be 52.2 kJ/mol and ca. 1.0, respectively. Therefore, the cross-linking reaction is approximately a first order reaction.
