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首页> 外文期刊>Journal of Applied Polymer Science >Sharkskin mechanism of high-impact polystyrene (HIPS) and rheological behavior of HIPS/TiO2 composites
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Sharkskin mechanism of high-impact polystyrene (HIPS) and rheological behavior of HIPS/TiO2 composites

机译：高抗冲聚苯乙烯（HIPS）的鲨鱼皮机理和HIPS / TiO2复合材料的流变行为

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摘要

The rheological behaviors of high-impact polystyrene (HIPS) and HIPS/TiO2 composites were investigated by use of a rheometer in the present article. HIPS exhibited a constant critical stress of the sharkskin in various temperatures, and the analysis indicated that the mechanism of sharkskin of HIPS was wall-slip and its special temperature dependency was determined by weak wall-melt adsorption. The experimental results also showed that the introduction of TiO2 into HIPS only slightly influenced the apparent viscosity (eta(a)) of the composites. Moreover, TiO2 exhibited an unusual effect on the non-Newtonian index of the composites at high shear rate. Both phenomena indicated the increase of inner free volume induced by TiO2 in molecularly rigid HIPS. Moreover, it was noteworthy that a featured stress could be used to label the dispersion of TiO2 in the HIPS matrix, and the numeric affinity of this featured stress and the critical stress of sharkskin revealed that both processes were relevant to the same molecular relaxation. (c) 2005 Wiley Periodicals, Inc.
机译：本文使用流变仪研究了高抗冲聚苯乙烯（HIPS）和HIPS / TiO2复合材料的流变行为。 HIPS在不同温度下均显示出恒定的鲨鱼皮临界应力，分析表明，HIPS的鲨鱼皮机理为壁滑，其特殊的温度依赖性由弱的壁熔体吸附决定。实验结果还表明，将TiO2引入HIPS只会轻微影响复合材料的表观粘度（eta（a））。此外，TiO 2在高剪切速率下对复合材料的非牛顿指数表现出不同寻常的影响。两种现象均表明在分子刚性HIPS中TiO2诱导的内部自由体积增加。此外，值得注意的是，可以使用特征应力来标记TiO2在HIPS基质中的分散，并且该特征应力的数值亲和力和鲨鱼皮的临界应力表明这两个过程都与相同的分子弛豫有关。 （c）2005年Wiley Periodicals，Inc.

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