中国塑料 ›› 2025, Vol. 39 ›› Issue (6): 1-5.DOI: 10.19491/j.issn.1001-9278.2025.06.001

• 材料与性能 •    

基于马来酸酐苯乙烯交替共聚物的耐候聚丙烯的制备及机理研究

赖金梅(), 郭照琰, 茹越, 戚桂村, 蔡传伦, 宋志海   

  1. 中石化(北京)化工研究院有限公司,北京 100013
  • 收稿日期:2024-07-22 出版日期:2025-06-26 发布日期:2025-06-20
  • 作者简介:赖金梅(1979—),女,四川遂宁市人,硕士,高级工程师,laijm.bjhy@sinopec.com
    第一联系人:地址:北京市海淀区阜成路11号《中国塑料》杂志社
    邮编:100048
  • 基金资助:
    中国石油化工股份有限公司资助项目:茂金属聚烯烃结构性能研究与加工成型技术开发(9?23ZS0434)

Preparation and mechanism of weather⁃resistant polypropylene based on maleic anhydride⁃styrene alternate copolymer

LAI Jinmei(), GUO Zhaoyan, RU Yue, QI Guicun, CAI Chuanlun, SONG Zhihai   

  1. Beijing Research Institute of Chemical Industry,Beijing 100013,China
  • Received:2024-07-22 Online:2025-06-26 Published:2025-06-20

摘要:

基于马来酸酐交替共聚物微球制备系列耐候聚丙烯样品,研究了改性聚丙烯在人工加速紫外老化前后的相对分子质量、力学性能、黄色指数变化情况。结果表明,马来酸酐苯乙烯交替共聚物含量为0.1 %时,样品经紫外加速老化后的力学性能保持率很高,与受阻胺光稳定剂改性样品相当;由于马来酸酐交替共聚物的尺寸为400 nm左右,均匀分散在树脂基体中,对紫外光能产生强反射;同时其可以吸收紫外光并以低能蓝光的形式辐射,从而减少紫外光对聚丙烯的破坏,所以其可以在含量较低时,提高基体材料的耐候性能。

关键词: 马来酸酐苯乙烯交替共聚物, 聚丙烯, 抗紫外老化

Abstract:

This study investigates the use of maleic anhydride⁃styrene alternate copolymer (MSL) to develop weathering⁃resistant polypropylene (PP). The relative molecular weight, mechanical properties, and yellowing index of MSL⁃modified PP were evaluated before and after UV⁃accelerated aging. The results indicated that at 0.1 wt% MSL, the material retained mechanical properties post⁃aging equivalent to those modified with commercial hindered amine light stabilizers (HALS). The MSL particles (≈400 nm in size) achieved homogeneous dispersion within the PP matrix. UV light was reflected while absorbing and re⁃emitting low⁃energy blue light, synergistically reducing UV⁃induced degradation. Even minimal MSL loading significantly enhanced the weatherability of the substrate, demonstrating its efficiency as a cost⁃effective UV stabilizer. These results position MSL as a promising additive for durable PP applications in outdoor environments.

Key words: maleic anhydride?styrene linear copolymer, polypropylene, ultraviolet light aging resistant

中图分类号: