›› 2023, Vol. 37 ›› Issue (5): 48-54.

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增韧聚氯乙烯电工套管复合材料的制备与性能研究

赵兴钟,李贝贝,王选伦   

  1. 重庆理工大学
  • 收稿日期:2023-01-17 修回日期:2023-02-20 出版日期:2023-05-26 发布日期:2023-05-26
  • 基金资助:
    重庆市技术创新与应用发展专项面上项目

Preparation and properties of toughened PVC electrical bushing composites

  • Received:2023-01-17 Revised:2023-02-20 Online:2023-05-26 Published:2023-05-26

摘要: 采用丙烯酸酯橡胶(ACM)、刚性体纳米碳酸钙(nano-CaCO3)、弹性体丙烯酸丁酯/甲基丙烯酸甲酯/丁二烯三元共聚物(AMB)作为增韧剂,对聚氯乙烯(PVC)进行复合增韧改性,并对复合材料的冲击性能、拉伸性能、加工流变性、动态热力学性能等进行了表征。结果表明,当PVC/ACM/nano-CaCO3/AMB质量比为100/10/3/9时,复合材料的常温冲击强度为27.64 kJ/m2,比纯PVC提升5倍;低温冲击强度为14.91 kJ/m2,比纯PVC提升4.1倍。加入AMB能使体系的玻璃化转变温度(Tg)下降,由93.71 ℃下降到86.36 ℃。

关键词: 聚氯乙烯, 增韧改性, 丙烯酸酯橡胶, 纳米碳酸钙, 丙烯酸丁酯/甲基丙烯酸甲酯/丁二烯三元共聚物

Abstract: Acrylate rubber (ACM), rigid body nano-calcium carbonate (nano-CaCO3), elastomeric butyl acrylate/methyl methacrylate/butadiene ternary copolymer (AMB) were used as tougheners to blend with poly(vinyl chloride) (PVC). The impact properties, tensile properties, processing rheology, and dynamic thermomechanical properties of the as-prepared compounds were investigated. The results indicated that when the mass ratio of PVC/ACM/nano-CaCO3/AMB was set to be 100/10/3/9, the compounds obtain low-temperature impact strength of 27.64 kJ/m2, which was 5 times higher than that of pure PVC. Their low temperature impact strength was 14.91 kJ/m2, which was 4.1 times higher than that of pure PVC. The addition of AMB reduced the glass transition temperature (Tg) of the compounding system, resulting in a decrease in Tg from 93.71 to 86.36 oC.

Key words: poly(vinyl chloride), toughening modification, acrylate rubber, nano-calcium carbonate, butyl acrylate/methyl methacrylate/butadiene terpolyme