期刊
EUROPEAN POLYMER JOURNAL
卷 45, 期 3, 页码 721-729出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.eurpolymj.2008.12.013
关键词
Naphthalene dianhydride; Polynaphthalimides; Fluorinated polyimides; Trifluoromethyl Bis(ether amine)s
资金
- National Science Council of the Republic of China
A series of novel fluorinated polynaphthalimides (PNIs) (2a-g) were synthesized from 1,4,5,8-naphthalenetetracarboxylic dianhydride (NTDA) and trifluoromethyl (CF3)-substituted aromatic bis(ether amine)s (1a-g) by high-temperature solution polycondensation in m-cresol using isoquinoline as catalyst. Almost all the PNIs were readily soluble in polar solvents such as N-methyl-2-pyrrolidone (NMP) and N,N-dimethylacetamide (DMAc) and could be solution-cast to transparent and tough films with high tensile strengths. The PNIs exhibited high thermal stability, with glass-transition temperatures of 262-383 degrees C. 10% weight loss temperatures above 528 degrees C in nitrogen or air, and char yields at 800 degrees C in nitrogen higher than 50%. In comparison with analogous PNIs without the -CF3 substituents, these fluorinated PNIs revealed an enhanced solubility and better film-forming capability. (C) 2008 Elsevier Ltd. All rights reserved,
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