IMIDE-ARYL ETHER BENZOTHIAZOLES

被引:12
作者
HEDRICK, JL
机构
[1] IBM Research Division, Almaden Research Center, San Jose, CA 95120-6099
关键词
IMIDE-ARYL ETHER BENZOTHIAZOLES; MORPHOLOGY; MECHANICAL PROPERTIES;
D O I
10.1016/0032-3861(92)90113-B
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Novel imide-aryl ether benzothiazole copolymers were prepared and their morphology and mechanical properties investigated. Diamines containing preformed benzothiazole rings were prepared and used in conventional polyimide syntheses. The preparation of these diamines involved the nucleophilic aromatic substitution reaction of 2,6-bis(4-fluorophenyl)benzo[1,2,4,5]bisthiazole with either 3- or aminophenol in the presence of K2CO3 in N-methyl-2-pyrrolidone to afford 2,6-bis(4-aminophenoxy-4-phenyl)benzo[1,2,4,5]dithiazole and 2,6-bis(3-aminophenoxy-4-phenyl)benzo[1,2,4,5]dithiazole, respectively. The monomers were each reacted with pyromellitic dianhydride to synthesize the desired poly(amic acids). Films were cast and cured to 350-degrees-C to effect imidization, producing films with good mechanical properties. The copolymers exhibited good dimensional (T(g) > 400-degrees-C) and thermal stability. Wide angle X-ray diffraction measurements showed that in one case a semicrystalline morphology was obtained producing a film with both a high modulus and low thermal expansion coefficient.
引用
收藏
页码:1399 / 1405
页数:7
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