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本文测定了一系列参照液体的表面张力和液体在PP,PS,PET,ABS,SBS,PE和尼龙6高聚物薄膜上的接触角,分别用Zisman和Kealble的方法得到各固体高聚物的表面张力,进而计算聚丙烯分别对其它六种高聚物的界面张力。并利用扫描电子显微镜和DSC研究的结果,说明了界面张力越大的聚丙烯共混物,其界面上的相互作用较小,分散相分散越不均匀。而聚丙烯在界面上的结晶行为的变化却取决于另一组分表面张力的极性分量,不取决于表面张力。同时也说明了,表面张力极性分量较大的高聚物对聚丙烯起成核剂作用,致使聚丙烯在共混物中的过冷结晶峰向高温方向移动。
In this paper, the surface tension of a series of reference liquids and the contact angles of liquids on PP, PS, PET, ABS, SBS, PE and Nylon 6 polymer films were measured. By using Zisman and Kealble methods, Surface tension, and then calculate the polypropylene on the other six kinds of polymer interfacial tension. The results of scanning electron microscopy (SEM) and scanning electron microscopy (DSC) show that the larger the interfacial tension of polypropylene blends, the less interfacial interactions and the more dispersed disperse phase. However, the change of the crystallization behavior of polypropylene at the interface depends on the polar component of the surface tension of the other component, and does not depend on the surface tension. It also shows that the larger polar component of surface tension of the polymer acts as a nucleating agent for the polypropylene, resulting in polypropylene in the blend of the overcooling crystallization peak to the high temperature direction.