中国塑料 ›› 2021, Vol. 35 ›› Issue (12): 37-44.DOI: 10.19491/j.issn.1001-9278.2021.12.007

• 材料与性能 • 上一篇    下一篇

PP/EPR/改性纤维素复合材料的制备及性能研究

韩贤新(), 刘喜军(), 王宇威   

  1. 齐齐哈尔大学材料科学与工程学院,黑龙江 齐齐哈尔 161006
  • 收稿日期:2021-05-26 出版日期:2021-12-26 发布日期:2021-12-22
  • 作者简介:韩贤新(1993—),男,助教/硕士研究生,主要从事高分子材料改性技术研究,1798373278@qq.com

Preparation and performance of PP/EPR/modified cellulose composite

HAN Xianxin(), LIU Xijun(), WANG Yuwei   

  1. College of Materials Science and Engineering,Qiqihar University,Qiqihar 161006,China
  • Received:2021-05-26 Online:2021-12-26 Published:2021-12-22
  • Contact: LIU Xijun E-mail:1798373278@qq.com;liuxijun2002@163.com

摘要:

以二元乙丙橡胶(EPR)为增韧材料、纤维素(α?C)为增强材料、EPR接枝乙烯醇共聚物(EPR?g?VA)为增容剂,采用熔融共混方法制备了聚丙烯(PP)/EPR/改性纤维素(M?C)复合材料。通过红外光谱、X射线衍射分析验证了M?C的结构,通过扫描电子显微镜、偏光显微镜、热重分析仪、塑料材料动态性能试验机、电子万能试验机等对PP/EPR/M?C复合材料的微观形貌、球晶尺寸、热稳定性以及力学性能进行分析测试。结果表明:EPR、EPR?g?VA包覆碱预处理纤维素(APC)形成“皮?芯”结构;相对于PP/EPR共混物,PP/EPR/M?C复合材料的热学性能、力学性能均有明显提高,当M?C添加量为6 %(质量分数,下同)时复合材料的冲击强度和维卡软化温度分别达到12.59 kJ/m2和146.5 ℃,并且复合材料中PP相的球晶尺寸变小且晶界面模糊。

关键词: 聚丙烯, 二元乙丙橡胶, 纤维素, 复合材料, 增强, 增韧

Abstract:

PP/EPR/modified cellulose (M?C) composites were prepared through melt blending using binary ethylene propylene rubber (EPR) as a toughening material, cellulose as a reinforcing material, and vinyl?alcohol?grafted EPR (EPR?g?VA) as a compatibilizer. Their structure was verified by infrared spectroscopy and X?ray diffraction analysis, and their micromorphology, spherulite size, thermal stability, and mechanical properties were analyzed using scanning electron microscope, polarizing microscope, thermogravimetric analyzer, plastic dynamic property testing machine, and electronic universal testing machine. The results indicated that a skin?core?like structure was formed in the alkali?pretreated cellulose coated with EPR and EPR?g?VA. Compared to the PP/EPR blends, the PP/EPR/M?C composites exhibited a significant improvement in thermal and mechanical properties. When the content of PP/EPR/M?C was 6 wt%, the composites exhibited a Vicat softening temperature of 146.5 ℃ and impact strength of 12.59 kJ/m2. Meanwhile, the spherulite size of PP phase in the composites became smaller and its crystal interface became blurry.

Key words: polypropylene, binary ethylene propylene rubber, cellulose, composite, strengthening, toughening

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