塑料科技2025，Vol.53Issue(11)：35-39,5.DOI:10.15925/j.cnki.issn1005-3360.2025.11.007
EPDM/PP TPV中橡胶相的交联作用研究
Study on Crosslinking Effect of Rubber Phase in EPDM/PP TPV
杨洋 1刘大晨 1张健 1龙思曼 1邵显桐1
作者信息
- 1. 沈阳化工大学材料科学与工程学院,辽宁 沈阳 110142
- 折叠
摘要
Abstract
Dynamic vulcanizates of ethylene propylene diene monomer rubber/polypropylene thermoplastic vulcanizate(EPDM/PP TPV)with different degrees of crosslinking were prepared using a crosslinking agent,a derivative of polyesters.The crosslinking effect of the polyester derivative on the EPDM rubber phase and the influence of the crosslinking degree on the microstructure and properties of the dynamic vulcanizates(TPV)were investigated.The results showed that the rubber phase had a higher degree of crosslinking when the amount of polyester added was 4 phr and 5 phr.The higher degree of crosslinking made the rubber phase less likely to coalesce,which was conducive to phase transformation.The rubber particles had clear boundaries and a particle size of around 1 μm.The higher degree of crosslinking increased the crystallization temperature(tc)of the EPDM/PP TPV and decreased the melting point(tm),the enthalpy of fusion(ΔHm)during the second heating process,the crystallization enthalpy(ΔHc),and the crystallinity(Xc).Moreover,the rubber phase had smaller particle size,lower viscosity,lower equilibrium torque,and higher melt flow rate(MFR),resulting in excellent processability.However,the higher degree of crosslinking also led to stress concentration points at the interface between EPDM and PP,making the TPV more prone to fracture and reducing the tensile strength and elongation at break.关键词
交联程度/三元乙丙橡胶/聚丙烯/动态硫化热塑性弹性体/相态转变Key words
Degrees of crosslinking/EPDM/PP/TPV/Phase transition分类
化学化工引用本文复制引用
杨洋,刘大晨,张健,龙思曼,邵显桐..EPDM/PP TPV中橡胶相的交联作用研究[J].塑料科技,2025,53(11):35-39,5.
