热处理对PB-1/PP共混体系性能的影响  

Effect oF Heat Treatment on Properties of PB-1/PP Blend System

作　　者：李树材[1] 胡汉林[1] 张美秋[1] 李淼[1] 

机构地区：[1]天津科技大学材料科学与化学工程学院,天津300457

出　　处：《塑料科技》2011年第9期49-52,共4页Plastics Science and Technology

摘　　要：将等规聚丁烯-1(PB-1)与聚丙烯(PP)按80/20的配比在挤出机中熔融共混,制备PB-1/PP共混体系。用偏光显微镜、差示量热扫描仪、动态黏弹谱仪、电子拉力机等分别研究了热处理对共混体系的结晶形态、结晶性能、动态力学性能及力学性能的影响。结果表明:经过热处理后,PB-1组分晶型I的熔融温度和熔融焓略有提高,晶型II的熔融峰逐渐消失,而分散相PP的熔融温度和熔融焓基本保持不变,两相的球晶形态在宏观上没有发生明显的变化;共混合金的储能模量有较明显提高,损耗角正切值有所下降;热处理可以明显改善共混体系的力学性能。PB-1/PP blend was prepared by melting blending isotactic polybutene-1（PB-1） and polypropylene with the ratio of 80/20 through extruder.The morphology,the crystallization,dynamic mechanical properties and mechanical properties were studied via polarized optical microscopy（POM）,differential scanning calorimetry（DSC）,dynamic mechanical analyzer（DMA） and mechanical testing machines,respectively.The results show that： after heat treatment,both the melt temperature and the melting enthalpy of crystal form I in PB-1 component increase,the melt peak of crystal form II disappears gradually,while the melt temperature and melting enthalpy of PP as a disperse phase maintains no changes,and the morphology of the crystallization has no change obviously;the storage modulus of the blend system increases and the tanδ decreases slightly;the mechanical properties of the blend system improve noticeably.

关 键 词：热处理 聚丁烯-1 聚丙烯 结晶 动态力学性能 力学性能 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业] TQ325.15