材料科学
天然橡胶
复合材料
纳米复合材料
乙丙橡胶
韧性
聚丙烯
动态力学分析
流变学
共聚物
硫化
三元乙丙橡胶
聚合物
作者
Shenghui Bao,Lianghai Zhu,Haibo Wang,Hailong Luo,Feng Chen,Wenwen Yu,Zhiyi Zhang,Xiaowei Zhuang,Qiang Wu,Yonggang Shangguan,Qiang Zheng
标识
DOI:10.1016/j.compscitech.2023.110210
摘要
Random copolymer polypropylene (PPR)/rubber/silica nanocomposites with excellent low-temperature toughness and balanced rigidity-toughness were prepared by using compound rubber composed of ethylene propylene rubber (EPR) and isoprene rubber (IR). Effects of compound rubber on reinforcement and toughening of PPR were systematically investigated through mechanical properties, dynamic mechanical behavior, morphologies and rheological behavior. Mechanical results showed compound rubber had higher efficiency in both reinforcement and toughening than single rubber. According to morphological analysis and rheological results, it was found that the EPR/IR compound rubber had a better distribution in PPR matrix due to the close viscosity to PPR matrix and maintained the characteristics of silica distribution at the interface between rubber and matrix. Dynamic mechanical results revealed PPR/compound rubber blends showed larger area of loss factor. Consequently, the better toughening effect and achieving good rigidity-toughness balance of compound rubber in PPR nanocomposites was ascribed to the synergistic effect of compound rubber and SiO2 nanoparticles, which results in smaller particle spacing and larger loss factor area of rubber phase in nanocomposites without changing preferential loading of nanoparticles at polymeric interface.
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