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EPR添加量对PP/EPR共混物力学性能和形态结构的影响

Zhang Bowen,Liu Xijun, Wang Yuwei, Zhang Yue, Zhang Chunyu,Zhang Xuequan

Chemical Industry Times（2023）

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Abstract
以二元乙丙橡胶(EPR)作为增韧剂,采用熔融共混的方法制备了聚丙烯(PP)/EPR共混物,采用冲击试验机、电子万能试验机、动态力学分析仪、扫描电子显微镜、偏光显微镜、差示扫描量热仪、熔体流动速率仪等分析研究了 EPR添加量对PP/EPR共混物力学性能和形态结构的影响.结果表明:PP与EPR具有良好的相容性,随着EPR添加量的增加,PP相的熔点和结晶规整性降低,PP相的结晶温度和结晶度提高;当EPR添加量达到30％时,PP/EPR共混物悬臂梁缺口冲击强度急剧升高,体系发生明显的脆韧转变.
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Key words
polypropylene,ethylene-propylene rubber,impact strength,brittle-ductile transition,compatibility
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