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首页> 外文期刊>Journal of Applied Polymer Science >Thermal and Mechanical Characterization of Maleimide-Functionalized Copoly(urethane-urea)s
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Thermal and Mechanical Characterization of Maleimide-Functionalized Copoly(urethane-urea)s

机译：马来酰亚胺官能化的共聚氨基甲酸酯-脲的热​​和机械表征

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摘要

Maleimide functionalized copoly(urethaneurea)s were prepared by the reaction of a binary mixture of dibenzyldiisocyanate and 5-maleimidosophthalic diisocyanate with a macrodiol (PEGA-2000), using diethylene glycol and trimethylol-propane as chain extender and crosslinkers in toluene-dichloromethane solutions at the ratio NCO/OH = 1.2. structures of polymers were confirmed by IR spectroscopy and properties were studied by thermal and mechanical analysis (dynamic mechanical analysis (DMA), differential scanning calorimetry, thermogravimetric analysis, stress-strain) and other physical methods. Maleimide modification increased the storage modulus and Young's modulus Of copoly(urethane-urea)s, slightly increased their glass transition temperature from -10.6 degrees C to -6.3 degrees C. Copoly(urethane-urea) networks obtained by thermal polymerization of maleimide functions Showed Significantly increased of the mechanical properties.
机译：通过使用二甘醇和三羟甲基丙烷作为增链剂和交联剂，在甲苯-二氯甲烷溶液中，于二甲苯二氯和三羟甲基丙烷作为扩链剂，通过二苄基二异氰酸酯和5-马来酰亚胺基邻苯二甲酸二异氰酸酯的二元混合物与大分子二醇的反应制备马来酰亚胺官能化的共聚（聚氨酯脲）。 NCO / OH之比= 1.2。聚合物的结构通过红外光谱确认，并通过热和机械分析（动态机械分析（DMA），差示扫描量热法，热重分析，应力应变）和其他物理方法研究性能。马来酰亚胺改性增加了共聚（氨基甲酸酯-脲）的储能模量和杨氏模量，使它们的玻璃化转变温度从-10.6℃略微提高到-6.3℃。通过马来酰亚胺官能团的热聚合获得的共聚（氨基甲酸酯-脲）网络表明力学性能大大提高。

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