乙烯含量及其分布对丙烯-乙烯共聚物热输运性质的影响  

Effect of ethylene content and distribution on thermal transport properties of propylene-ethylene copolymer

作　　者：符明恒 高建树 杨啸 邵磊山 李静静[1] 蒋文军[1] 刘振宇[1] FU Mingheng;GAO Jianshu;YANG Xiao;SHAO Leishan;LI Jingjing;JIANG Wenjun;LIU Zhenyu(China Petroleum&Chemical Corporation Maoming Branch,Maoming 525000,China;School of Materials Science and Engineering,South China University of Technology,Guangzhou 510006,China)

机构地区：[1]中国石油化工股份有限公司茂名分公司,广东茂名525000 [2]华南理工大学材料科学与工程学院,广东广州510006

出　　处：《合成树脂及塑料》2025年第1期37-41,共5页China Synthetic Resin and Plastics

摘　　要：通过将等规聚丙烯分子链中丙烯链段替代为乙烯链段,建立了丙烯-乙烯共聚物的物理模型,利用非平衡分子动力学方法研究了乙烯含量及其分布对共聚物热输运性质的影响。结果表明:聚合度为50的分析模型可反映聚合物的真实性质且计算量适中;随着乙烯含量的增加,共聚物的热导率逐渐增加;相同乙烯含量时,共聚物中乙烯链段数越小,对其声子振动态密度的影响越小,有助于提升其热导率。The physical model of ethylene-propylene copolymer was established by substituting propylene segment for ethylene segment in the molecular chain of isotactic polypropylene.The impact of ethylene content and distribution on thermal transport properties of the copolymer was investigated by non-equilibrium molecular dynamics.The results show that the analytical model with polymerization degree of 50 can reflect the intrinsic properties of the polymer with moderate calculation.The thermal conductivity of the polymer increases with the increase of ethylene content.In addition,under the same ethylene content,as the distribution number of ethylene chains in the copolymer decreases,there exhibits slight discrepancy on the phonon vibrational density of state,which contributes to an enhancement of the thermal conductivity of the wpolymer.

关 键 词：丙烯-乙烯共聚物 分子动力学模拟 乙烯含量 热导率 振动态密度 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]