A dicyanate ester, namely, 2,2-bis-(4-cyanatophenyl)propane, and a bismaleimide, namely, 2,2-bis[4-(4-maleimido phenoxy)phenyl]propane, possessing closely resembling backbone structures, were cured together to derive bismaleimide–triazine network polymers of varying compositions. The blend manifested a eutectic melting behavior at a 1 : 1 composition with a eutectic melting point of 15°C. The cure characterization of the blends was done by DSC and dynamic mechanical analyses (DMA). The near simultaneous cure of the blend could be transformed to a clear sequential one by catalyzing the dicyanate cure to lower temperature using dibutyl tin dilaurate. The two-stage, independent cure of the components of the blend evidenced in DSC was confirmed by DMA. The cure profile of the bismaleimide component predicted from the kinetic data derived from nonisothermal DSC was found to be in league with the isothermal DMA behavior. Both techniques led to optimization of the cure schedule of the blends. The cured polymers were characterized by FTIR and TGA. The cured blends underwent decomposition in two stages, each corresponding to the polycyanurate and polybismaleimide. Enhancing the bismaleimide component did not alter the initial decomposition temperature, but led to reduced rate of thermal degradation at higher temperature. Interlinking of the two networks and enhancing crosslink density through coreaction of the blend with 4-cyantophenylmaleimide unaffected the initial decomposition properties but was conducive for increasing the char residue significantly. Computation of activation parameters for the thermal decomposition of the polymers confirmed that the first step in the degradation of the blends is caused by the polycyanurate component. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 74: 3365–3375, 1999

中文翻译：

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双酚A基氰酸酯和双马来酰亚胺的共混物：固化和热特性

具有与骨架结构非常相似的二氰酸酯，即2,2-双-（4-氰基苯基）丙烷和双马来酰亚胺，即2,2-双[4-（4-马来酰亚胺基苯氧基）苯基]丙烷。一起固化可得到组成不同的双马来酰亚胺-三嗪网络聚合物。该共混物在1：1的组成下表现出共晶熔融行为，其共晶熔点为15℃。共混物的固化特性通过DSC和动态力学分析（DMA）进行。通过使用二月桂酸二丁基锡催化将二氰酸酯固化至较低的温度，可以将共混物的几乎同时固化转变为清晰的顺序固化。DMA证实了DSC中证明的共混物组分的两阶段独立固化。由非等温DSC得出的动力学数据预测的双马来酰亚胺组分的固化曲线与等温DMA行为相吻合。两种技术均导致了共混物固化时间表的优化。固化的聚合物通过FTIR和TGA表征。固化的共混物经历两个阶段的分解，每个阶段分别对应于聚氰尿酸酯和聚双马来酰亚胺。增强双马来酰亚胺组分不会改变初始分解温度，但会导致高温下的热降解速率降低。通过共混物与4-氰基苯基马来酰亚胺的共反应，两个网络的交联和增强的交联密度不影响初始分解性能，但有利于显着增加炭渣。用于聚合物热分解的活化参数的计算证实，共混物降解的第一步是由聚氰脲酸酯组分引起的。©1999 John Wiley＆Sons，Inc. J Appl Polym Sci 74：3365–3375，1999