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首页> 外文期刊>Journal of Applied Polymer Science >Properties of poly(butylene terephthalate) chain-extended by epoxycyclohexyl polyhedral oligorneric silsesquioxane
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Properties of poly(butylene terephthalate) chain-extended by epoxycyclohexyl polyhedral oligorneric silsesquioxane

机译：环氧环己基多面体低聚倍半硅氧烷扩链聚对苯二甲酸丁二醇酯的性能

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Epoxycyclohexyl polyhedral oligomeric silsesquioxane (epoxy-POSS) was used to prepare a chain-extended poly(butylene terephthalate) (PBT) with a twin-screw extruder. The effect of epoxy-POSS on the melt flow index, mechanical properties, rheological behavior, and thermal properties of chain-extended PBT was investigated. PBT had an intrinsic viscosity of 1.1 dL/g and a carboxyl content of 21.6 equiv/10(6) g, but the PBT chain-extended with 2 wt % epoxy-POSS had an intrinsic viscosity of 1.7 dL/g and a carboxyl content lower than 7 equiv/10(6) g. After the addition of epoxy-POSS, the melt flow index of PBT dramatically decreased, the elongation at break increased greatly, the tensile strength increased slightly, and the thermal stability was also improved. (C) 2007 Wiley Periodicals, Inc.
机译：环氧环己基多面体低聚倍半硅氧烷（epoxy-POSS）用于用双螺杆挤出机制备扩链的聚对苯二甲酸丁二酯（PBT）。研究了环氧-POSS对扩链PBT的熔体流动指数，机械性能，流变行为和热性能的影响。 PBT具有1.1 dL / g的特性粘度和21.6当量/ 10（6）g的羧基含量，但是用2 wt％环氧-POSS扩链的PBT具有1.7 dL / g的特性粘度和羧基含量低于7当量/ 10（6）g。加入环氧-POSS后，PBT的熔体流动指数急剧下降，断裂伸长率大大提高，拉伸强度略有提高，热稳定性也得到改善。 （C）2007 Wiley期刊公司

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