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Facile synthesis of a novel hyperbranched poly(urethane-phosphine oxide) as an effective modifier for epoxy resin
Polymer Degradation and Stability ( IF 5.9 ) Pub Date : 2018-05-22 , DOI: 10.1016/j.polymdegradstab.2018.05.021
Chao Ma , Shuilai Qiu , Junling Wang , Haibo Sheng , Yi Zhang , Weizhao Hu , Yuan Hu

In this work, a novel hyperbranched poly (urethane-phosphine oxide) (HPUPO) was facilely synthesized from 4,4′-diphenylmethane diisocyanate and trihydroxymethylphosphine oxide at room temperature. When HPUPO was incorporated, flame retardancy and toughness of epoxy resin are improved with maintained Tg and increased modulus and strength. The gas and condensed phase flame retardant mechanisms and toughening mechanisms are provided. The poor compatibility of epoxy resin/HPUPO hybrids determines the unchanged Tg of epoxy matrix phase. The tensile modulus and strength and storage modulus of modified epoxy thermosets are raised due to more rigid skeleton of HPUPO and hydrogen bond interaction. Moreover, the reactivity of epoxy resin curing systems containing HPUPO is elevated for the catalytic effect of its hydroxyl. The surface hydrophilicity of epoxy resin composites is decreased resulting from their increased surface roughness and the hydrophobicity of HPUPO. And the thermal decomposition temperature of epoxy resin hybrids is depressed. The epoxy resins modified by HPUPO with simple synthesis and preparation can be used for various high-performance applications in industries.



中文翻译:

新型超支化聚(氨基甲酸酯-氧化膦)作为环氧树脂的有效改性剂的简便合成

在这项工作中,在室温下容易地由4,4'-二苯基甲烷二异氰酸酯和三羟甲基膦氧化物合成了一种新型的超支化聚(氨基甲酸酯-氧化膦)(HPUPO)。当掺入HPUPO时,环氧树脂的阻燃性和韧性在保持T g和增加模量和强度的情况下得到改善。提供了气相和冷凝相阻燃机理和增韧机理。环氧树脂/ HPUPO杂化物的相容性差决定了未改变的T g环氧基质相。改性环氧树脂热固性树脂的拉伸模量,强度和储能模量由于HPUPO的更刚性骨架和氢键相互作用而提高。而且,由于其羟基的催化作用,含有HPUPO的环氧树脂固化体系的反应性提高了。环氧树脂复合材料的表面亲水性由于其增加的表面粗糙度和HPUPO的疏水性而降低。并且降低了环氧树脂杂化物的热分解温度。经HPUPO改性,合成和制备简单的环氧树脂可用于工业中的各种高性能应用。

更新日期:2018-05-22
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