Anomalous viscosity decrease of polycarbonate by addition of polystyrene
Anomalous viscosity decrease of polycarbonate by addition of polystyrene
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DOI：
10.1016/j.polymer.2019.03.015
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发表时间：
2019-04-29
期刊：
影响因子：
4.6
通讯作者：
Yamaguchi, Masayuki
中科院分区：
文献类型：
--
作者：
Sako, Takumi;Date, Jitsuhiro;Yamaguchi, Masayuki
研究了包含聚碳酸酯（PC）和低分子量聚苯乙烯（LPS）的二元共混物的剪切粘度。结果发现，添加L-PS后PC的粘度显着降低。尽管动态机械性能表明 L-PS 与 PC 不混溶，但挤出线材的形态观察表明发生了剪切诱导的相混合。此外，发现在高剪切应力条件下粘度下降明显，这比添加低分子量PC更明显。因此，L-PS的添加大大改善了注塑时的流动性。
The shear viscosity of binary blends comprising polycarbonate (PC) and low-molecular-weight polystyrene (LPS) was examined. It was found that the viscosity of PC significantly decreases by the addition of L-PS. Although the dynamic mechanical properties indicated that L-PS is immiscible with PC, the morphology observation of the extruded strand clarified that shear-induced phase-mixing occurs. Furthermore, the viscosity decrease was found to be pronounced in the high shear stress condition, which is much more obvious than that by the addition of low-molecular-weight PC. Consequently, the addition of L-PS improves the flowability at injection-molding greatly.