中国塑料 ›› 2021, Vol. 35 ›› Issue (12): 102-107.DOI: 10.19491/j.issn.1001-9278.2021.12.017

• 助剂 • 上一篇    下一篇

基于滤板应用的β成核剂增韧改性聚丙烯研究

王文超1, 王艳芝1(), 张振利2, 张居亮2, 刘少磊2, 魏冰2   

  1. 1.中原工学院纺织学院,郑州 451191
    2.河南大张过滤设备有限公司,河南 许昌 461672
  • 收稿日期:2021-05-26 出版日期:2021-12-26 发布日期:2021-12-22
  • 基金资助:
    2021年度河南省高等学校重点科研项目(21A430047);河南省科技创新优秀团队项目(CXTD2013048)

Toughening modification of polypropylene with β⁃nucleating agent for application in filter plates

WANG Wenchao1, WANG Yanzhi1(), ZHANG Zhenli2, ZHANG Juliang2, LIU Shaolei2, WEI Bing2   

  1. 1.School of Textile,Zhongyuan University of Technology,Zhengzhou 451191,China
    2.Henan Da Zhang Filtration Equipment Co,Ltd,Xuchang 461672,China
  • Received:2021-05-26 Online:2021-12-26 Published:2021-12-22
  • Contact: WANG Yanzhi E-mail:5605@zut.edu.cn

摘要:

针对目前国内通用的板框压滤机聚丙烯(PP)滤板框在使用中出现的开裂问题,通过添加β成核剂并利用差示扫描量热仪和偏光显微镜等研究了PP的力学性能、热变形温度、结晶行为及晶体形态的变化。结果表明,随着β成核剂含量增加,PP的拉伸强度和拉伸模量呈先下降后上升的趋势,断裂伸长率和冲击强度呈先上升后下降的趋势;当β成核剂含量为0.05 %(质量分数,下同)时,PP中的β晶接近完善,β晶的相对含量激增至85.25 %,此时样品的冲击强度增至纯PP的4倍,拉伸强度和拉伸模量损失较小;当β成核剂含量为0.50 %时,样品的热变形温度较纯PP提升约40 ℃。

关键词: 聚丙烯, β成核剂, 冲击强度, β晶型

Abstract:

To solve the cracking problem of the PP filter plate and frame commonly used in China, the mechanical properties, thermal deformation temperature, crystallization behavior, and crystal morphology of the PP modified with a β?nucleating agent were investigated using differential scanning calorimetry and polarizing microscope. The results indicated that the tensile strength and modulus of PP decreased at first and then tended to increase with an increase in the β?nucleating agent content. Its elongation at break and impact strength also showed an increase at first and then a decrease. When 0.05 wt% β?nucleating agent was added, the β crystal in PP was nearly perfect, and the relative content of β crystal increased to 85.25 %. Meanwhile, the modified PP exhibited an increase in impact strength by 4 times compared to pure PP, and the losses in tensile strength and modulus were small. When the content of β?nucleating agent was 0.5 wt%, the modified PP showed a thermal deformation temperature by approximately 40 ℃ higher than pure PP.

Key words: polypropylene, β?nucleating agent, impact strength, β crystal

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