Prediction of comprehensive mechanical properties of thermoplastic vulcanizate (TPV) with various composition ratios based on a micromechanical method

材料科学 复合材料 热塑性塑料 聚丙烯 弹性(材料科学) 弯曲 微观结构 模数 压力(语言学) 变形(气象学) 哲学 语言学
作者
Congchao Liu,Lifeng Ma,Chengyuan He,Xinhu Xu
出处
期刊:Modern Physics Letters B [World Scientific]
卷期号:37 (08) 被引量:4
标识
DOI:10.1142/s021798492250230x
摘要

In the field of thermoplastic vulcanizate (TPV), experimental methods cannot quantify the relationship between the internal structure and performance of TPV, and are not conducive to the accurate design of TPV structure and performance, which is one of the problems to be solved in this field. In this study, a simple and effective two-dimensional micromechanical model was established based on the real microstructure of TPV by using the micromechanical method and the mechanical properties of TPV with different ethylene propylene diene monomer (EPDM) mass fractions were studied. The results show that with the increase of EPDM content, the maximum stress distribution area of TPV would change, the elastic modulus of TPV would gradually decrease, while the maximum stress of polypropylene (PP) phase would first decrease and then increase and strain corresponding to elastic–plastic change would also increase. The resilience of TPV increases with the increase of EPDM content and decreases with the increase of strain load. When the EPDM content is higher than 70%, the “S” bending deformation would occur at the thinnest part of PP matrix ligament.
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