Kinetics-controlled compatibilization of immiscible polypropylene/polystyrene blends using nano-SiO2 particles
Kinetics-controlled compatibilization of immiscible polypropylene/polystyrene blends using nano-SiO2 particles
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DOI：
10.1016/j.polymer.2004.01.037
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发表时间：
2004-03
期刊：
影响因子：
4.6
通讯作者：
Qin Zhang;Hong Yang;Q. Fu
中科院分区：
文献类型：
--
作者：
Qin Zhang;Hong Yang;Q. Fu
刚性无机填料作为高分子材料的增强剂已经有很长的历史了。近年来，填料作为相容剂用于不相容聚合物共混体系的研究越来越多。本文报道了纳米SiO2粒子增容聚丙烯（PP）/聚苯乙烯（PS）共混体系的相形态和性能的变化。采用SEM、DSC、战神和力学性能测试等方法研究了填料含量和混炼时间对复合材料的相形态、结晶行为、流变性能和力学性能的影响。纳米SiO2粒子的引入使PS相尺寸急剧减小，粒径分布非常均匀。然而，在较长的混合时间的PS尺寸的增加再次看到，表明动力学控制的增容。加入纳米SiO2粒子后，PS的玻璃化转变温度没有发生变化，共混物的粘度增加，这进一步证实了上述结论。从动力学角度分析了纳米SiO2粒子对PP/PS共混体系的增容作用机理。
Rigid inorganic filler has been long time used as a reinforcement agent for polymer materials. Recently, more work is focused on the possibility that using filler as a compatibilizer for immiscible polymer blends. In this article, we reported our efforts on the change of phase morphology and properties of immiscible polypropylene(PP)/polystyrene(PS) blends compatibilized with nano-SiO2particles. The effects of filler content and mixing time on the phase morphology, crystallization behavior, rheology, and mechanical properties were investigated by SEM, DSC, ARES and mechanical test. A drastic reduction of PS phase size and a very homogeneous size distribution were observed by introducing nano-SiO2particles in the blends at short mixing time. However, at longer mixing time an increase of PS size was seen again, indicating a kinetics-controlled compatibilization. This conclusion was further supported by the unchanged glass transition temperature of PS and by increased viscosity in the blends after adding nano-SiO2particles. The compatibilization mechanism of nano-SiO2particles in PP/PS blends was proposed based on kinetics consideration.