Viscosity of dilute solutions of randomly branched poly (butyleneterephthalate)

F. Pilati, A. Munari, P. Manaresi
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引用次数: 3

Abstract

Experimental intrinsic-viscosity data for randomly branched polydisperse polymer samples of poly(butyleneterephthalate), prepared by polycondensation of dimethylterephthalate (DMT) and 1,4-butanediol with small amounts of 1,3,5-tricarboxymethylbenzene (TMT) (from 0.5 to 1.5 mol% of trifunctional units), were used to test different theoretical treatments for different g-rules.

It was found that the g32 -rule gave the best fits for the results.

Correlation of intrinsic viscosity with the weight-average degree of branching, Bw, was obtained by an empirical equation; intrinsic viscosity was also correlated with melt-flow index.

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无规支化聚对苯二甲酸丁二酯稀溶液的粘度
通过对苯二甲酸二甲酯(DMT)和1,4-丁二醇与少量1,3,5-三羧甲基苯(TMT)(0.5至1.5mol%的三官能单元)的缩聚制备的聚(对苯二甲酸丁二酯)的随机支化多分散聚合物样品的实验特性粘度数据,对不同g规则的不同理论处理进行了测试。发现g32-规则对结果的拟合最好。特性粘度与重均支化度Bw的相关性通过经验方程得到;特性粘度也和熔体流动指数相关。
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Materials Chemistry Materials Chemistry Author index On the separation of the contributions of powder particle cores and intergranular contacts to the electric resistivity of the compressed powder materials Vingt ans apres: To Karplus or not to Karplus?
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