THE MELT COMPATIBILITY OF BLENDS OF POLYPROPYLENE AND ETHYLENE-PROPYLENE COPOLYMERS

被引:96
作者
LOHSE, DJ
机构
[1] Exxon Chemical Co, Linden, NJ, USA, Exxon Chemical Co, Linden, NJ, USA
关键词
COPOLYMERS - Blending - MICROSCOPIC EXAMINATION - POLYMERS - Solubility;
D O I
10.1002/pen.760262106
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
Blends of polypropylene with ethylene-propylene copolymers of various compositions have been studied by small angle neutron scattering with regard to their compatibility at room temperature and in the melt. It has long been known that such blends separate into distinct phases at lower temperatures due to the crystallinity of the isotactic polypropylene. The work described herein has shown that these blends are also immiscible in the melt, even when the ethylene content of the copolymer is as low as 8 percent. Moreover, the separated phase domains grew rapidly at melt temperatures. Blends of atactic polypropylene with isotactic polypropylene did become miscible upon melting.
引用
收藏
页码:1500 / 1509
页数:10
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