When 4,4'-bis (3,4-dicyanophenoxy) biphenyl is heated with small amounts of aromatic amine or amidine salts, a highly crosslinked polytriazine is obtained. This polymer has been shown to be the same as that reported when bisphthalonitriles are heated with amines. Salts promote this reaction more readily and the glass transition temperature of the polymer after post-cure at 315°C is generally 30°C higher than when free bases are used. The fracture properties and elasticity of the salt-cured polymer have been measured at temperatures up to 250°C. As a model system, the self reaction of phthalonitrile promoted by amines and their salts has been studied. In both cases, poly[4-(2-cyanophenyl)-1,3,5-triazine-2,6-diyl-1,2-phenylene] is produced, and more efficiently using the salts. A reaction mechanism for this polymerization has been proposed. © 1994 John Wiley & Sons, Inc.

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关于由双邻苯二甲腈形成的高温树脂的性质

当将4,4'-双（3,4-二氰基苯氧基）联苯与少量的芳族胺或am盐加热时，可获得高度交联的聚三嗪。已经显示出该聚合物与用胺加热双邻苯二甲腈时报道的聚合物相同。盐更容易促进该反应，并且在315℃下后固化后，聚合物的玻璃化转变温度通常比使用游离碱时高30℃。已在高达250°C的温度下测量了盐固化聚合物的断裂性能和弹性。作为模型系统，研究了胺及其盐促进的邻苯二甲腈的自反应。在两种情况下，都可以更有效地使用聚[4-（2-氰基苯基）-1,3,5-三嗪-2,6-二基-1,2-亚苯基]。已经提出了该聚合反应的反应机理。