iPB/PP合金的相容性、熔融及结晶行为

摘要

The high isotactic poly(1-butylene)(iPB)/polypropylene(PP) alloys were prepared by means of melt extrusion in a twin-screw extruder. The compatibility of iPB and PP, the melting and crystallization behaviors of iPB/PP alloys were investigated by dynamic mechanical analyzer(DMA) and differential scanning calorimeter(DSC).The results indicate that iPB/PP alloy is a partially compatible system. The melting temperature and melting enthalpy of iPB and PP tend to decrease with the increase of the opposite component content. The perfection of crystallization and crystallinity degree of iPB and PP are interfered by each other. When the mass ratio of iPB to PP is 60∶40,the crystallization temperatures of iPB and PP are increased by 2.8,3.8 ℃ respectively, and both iPB and PP can promote the crystallization of the opposite component. The crystallization rate of iPP is greatly increased when the mass content of PP is 10%-70%.%采用双螺杆挤出机熔融挤出制备高全同聚1-丁烯（iPB）/聚丙烯（PP）合金，采用动态热机械分析仪和差示扫描量热仪研究其相容性及熔融结晶行为。结果表明：iPB/PP为部分相容体系；iPB和PP的熔融温度、熔融焓均随对方组分含量的增加而逐渐降低，两者相互干扰了对方结晶的完善程度和结晶度；当m（iPB）/m（PP）=60∶40时，iPB结晶温度提高2.8℃，PP结晶温度提高3.8℃，两者相互影响、促进了对方的结晶；w（PP）为10%～70%时，iPB的结晶速率提高显著。