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首页> 外文期刊>Journal of Applied Polymer Science >TETRAPHENYLETHANE INIFERTERS - POLYURETHANE-POLYSTYRENE MULTIBLOCK COPOLYMERS THROUGH LIVING RADICAL POLYMERIZATION
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TETRAPHENYLETHANE INIFERTERS - POLYURETHANE-POLYSTYRENE MULTIBLOCK COPOLYMERS THROUGH LIVING RADICAL POLYMERIZATION

机译：通过进行自由基聚合，对苯四甲酸酯-聚氨酯-聚氨酯多嵌段共聚物

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摘要

Toluene diisocyanate-based polyurethane iniferters containing tetraphenylethane groups in between polyurethane blocks were prepared by the reaction of isocyanate-terminated prepolymers and 1,1,2,2-tetraphenyl-1,2-ethanediol. When these iniferters were decomposed in the presence of styrene, polyurethane-polystyrene multiblock copolymers were obtained through a ''living'' radical mechanism. The effect of changing polyol on the T-g, thermal stability, and molecular weight of polyurethane iniferters as well as block copolymers was studied. The molecular weight of the block copolymers increased with increasing both polymerization time and conversion. (C) 1997 John Wiley & Sons, Inc. [References: 27]
机译：通过异氰酸酯封端的预聚物与1,1,2,2-四苯基-1,2-乙二醇的反应，制备了在聚氨酯嵌段之间包含四苯基乙烷基团的甲苯二异氰酸酯基聚氨酯引发剂。当这些引发剂在苯乙烯存在下分解时，通过“活性”自由基机理获得了聚氨酯-聚苯乙烯多嵌段共聚物。研究了多元醇的变化对聚氨酯引发剂和嵌段共聚物的T-g，热稳定性和分子量的影响。嵌段共聚物的分子量随着聚合时间和转化率的增加而增加。 （C）1997 John Wiley＆Sons，Inc. [参考：27]

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