Prediction and evolution of core-shell morphology and their effect on mechanical properties of PP blends

被引:0
作者
Chen, Xunwei [1 ]
Li, Zhi [1 ]
Qiu, Biwei [1 ,3 ]
Shi, Jiangao [2 ]
机构
[1] Univ Shanghai Sci & Technol, Sch Mat & Chem, Shanghai, Peoples R China
[2] Chinese Acad Fishery Sci, East China Sea Fisheries Res Inst, Shanghai, Peoples R China
[3] Univ Shanghai Sci & Technol, Sch Mat & Chem, 516 Jungong Rd, Shanghai 200093, Peoples R China
基金
中国国家自然科学基金;
关键词
Elastomer; polypropylene; core-shell structure; compatibility; fracture toughness; LINEAR VISCOELASTIC BEHAVIOR; MULTIPHASE POLYMER BLENDS; PHASE MORPHOLOGIES; DISPERSED PARTICLES; POLYPROPYLENE; CRYSTALLIZATION; VISCOSITY; COMPATIBILIZERS; MICROSTRUCTURE; POLYETHYLENE;
D O I
10.1177/07316844231222061
中图分类号
TB33 [复合材料];
学科分类号
摘要
The prediction of phase morphology is highly valuable in designing and regulating the properties of multiphase composites, particularly polymer blends. In this study, we prepared two types of ternary blends, PP/HDPE/EPR and PP/HDPE/EPDM composites and compared and analyzed the predicted and observed phase morphology of blends with different elastomers. Using Palierne and Bousmina equations, we calculated the interfacial tensions between two components in PP blends and then predicted the relationship between the spreading coefficient, interfacial tension, and phase morphology according to the spreading coefficient theory. Based on our findings, it was observed that the core-shell structure of EPR and EPDM rubber phase encapsulated HDPE core tends to form in PP ternary blends, which aligns with our experimental results. Additionally, SEM morphology observation results revealed a less number of dispersed phases in PP/HDPE/EPR composites with the same composition ratio. It was observed that the shell had a greater thickness due to the difficulty in dispersing EPR with higher viscosity. Mechanical tests indicated that composites with thin-shell and small-core dispersed phases had better toughness. These composites also displayed less yield strength loss under the same impact conditions compared to those with single rubber phases.
引用
收藏
页数:10
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