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Melt Rheological Properties of PBT/SEBS and Reactively Compatibilized PBT/SEBS/SEBS-g-MA Polymer Blends

机译:PBT / SEBS和反应相容的PBT / SEBS / SEBS-g-MA聚合物共混物的熔体流变特性

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摘要

Melt rheological properties of PBT/SEBS and PBT/SEBS/SEBS-g-MA blends at SEBS volume fraction (phi(d))=0.00-0.38 were studied at 240 degrees C, 250 degrees C and 260 degrees C using a capillary rheometer. The compatibilizer SEBS-g-MA addition resulted in significant reduction in the dynamic interfacial tension which in turn led to increased phase adhesion. The power law exponent n decreased with increasing phi(d) and increasing temperature for both the compatiblized and uncompatiblized blends. The consistency index of PBT/SEBS increased with increasing phi(d) but were smaller than those of PBT/SEBS/SEBS-g-MA blends. Melt elasticity such as die swell and first normal stress difference increased with phi(d). Variations of first normal stress coefficient function ((1)), recoverable shear strain ((R)), relaxation time (), and shear compliance (J(c)) values versus shear rate were analyzed. (c) 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41402.
机译:使用毛细管流变仪研究了SEBS体积分数(phi(d))= 0.00-0.38时PBT / SEBS和PBT / SEBS / SEBS-g-MA共混物的熔体流变性能。增容剂SEBS-g-MA的添加导致动态界面张力的显着降低,进而导致相粘合力的增加。对于相容和非相容混合物,幂律指数n随phi(d)和温度的升高而降低。 PBT / SEBS的稠度指数随phi(d)的增加而增加,但小于PBT / SEBS / SEBS-g-MA混合物的稠度指数。熔体弹性(如模头膨胀和第一法向应力差)随phi(d)的增加而增加。分析了第一法向应力系数函数((1)),可恢复剪切应变((R)),弛豫时间()和剪切顺应性(J(c))值相对于剪切速率的变化。 (c)2014 Wiley Periodicals,Inc. J. Appl。 Polym。科学2015,132,41402。

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