doi:10.16597/j.cnki.issn.1002-154x.2023.04.004
EPR 添加量对 PP / EPR 共混物力学性能和形态结构的影响
张博文2 刘喜军1∗ 王宇威1 张悦4 张春雨3 张学全3
(1. 齐齐哈尔大学 材料科学与工程学院,黑龙江 齐齐哈尔 161006; 2. 山东道恩高分子材料股份有限公司, 山东 龙口 265700; 3. 青岛科技大学 高分子科学与工程学院,山东 青岛 266000; 4. 埃克森美孚亚太研发有限公司,上海 200241)
Effect of EPR Addition on Mechanical Properties and Morphological Structure of PP / EPR Blends
Zhang Bowen 2 Liu Xijun 1∗ Wang Yuwei 1 Zhang Yue 4 Zhang Chunyu 3 Zhang Xuequan 3
(1. College of Materials Science and Engineering, Qiqihar University, Heihongjiang Qiqihar 161006; 2. Shandong Dawn Polymer Co. , Ltd. , Shandong Longkou 265700; 3. School of Polymer Science and Engineering, Qingdao University of Science and Technology, Shandong Qingdao 266000; 4. Exxon Mobil Asia Pacific Research and Development Co. , Ltd. , Shanghai 200241)
摘要:
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。
关键词：聚丙烯 二元乙丙橡胶 冲击强度 脆韧转变 相容性；
Abstract：
Polypropylene (PP) / ethylene-propylene rubber (EPR) blends was prepared using melt blending method with EPR as compatibilizer. The effects of the amount of EPR added on mechanical properties and morphological structure of PP / EPR blends were studied by impact tester, electronic universal tester, dynamic mechanical analyzer, scanning electron microscope, polarizing microscope, differential scanning calorimeter and melt flow rate meter. The results showed that PP and EPR have good compatibility. With the increase in the amount of EPR added, the melting point and crystallization regularity of PP phase reduced, and the crystallization temperature and crystallinity of PP phase improved. When the EPR content was 30%, the Izod notched impact strength of PP / EPR blends increased sharply, and the system underwent a significant brittle-ductile transition.
Keywords：polypropylene; ethylene-propylene rubber; impact strength; brittle-ductile transition; compatibility;