作者:戴亚杰，刘政坤，姜 鹏，张文龙，李雪姣
Authors:DAIYajie, LIUZhengkun, JIANGPeng, ZHANGWenlong, LIXuejiao摘要: 针对乙烯 - 醋酸乙烯共聚物( EVA) 极性较弱需要接枝改性以及缺少相关理论研究的问题,采用熔融接枝法,以线性低密度聚乙烯( LLDPE) 和 EVA 混合物作为基体,丙烯腈( AN) 为接枝单体制备( LLDPE / EVA = 60% / 40% ) -g-AN,研究该体系单体含量、引发剂含量和反应温度对于初始接枝速率的影响。 结果表明:初始接枝反应速率与单体含量呈 0. 87 次方关系,与引发剂含量呈 0. 36 次方关系,与反应温度关系服从 Arrhenius 方程,该反应体系的接枝动力学的速率模型为 Re= Aexp( - 2. 86/T)[ M]0. 87 [ I]0. 36 ,接枝反应的活化能 Ea = 23. 78 kJ / mol,为 LL-DPE / EVA 熔融接枝 AN 的理论研究以及工艺优化提供依据。

Abstract: In viewof the weak polarity of ethylene vinyl acetate copolymer ( EVA) which need graft modification and the lack of relevant theoretical research, this article uses the melt grafting,using the linear lowdensity polyethylene ( LLDPE) and EVA mixture as the matrix, acrylonitrile ( AN) as the graft monomer to prepare ( LLDPE / EVA)-g-AN. The effect of the monomer content, initiator content, experimental temperature and initial grafting rate has been discussed. The results show that the initial grafting reaction rate is 0. 87 power with monomer content, 0. 36 power with initiator content, and the relationship with experimental temperature obeys Arrhenius equation. The model of grafting kinetics rate of the reaction system was obtained Re= Aexp( - 2. 86/T)[ M]0. 87 [ I]0. 36 , with the activation energy of the grafting reaction Ea = 23. 78 kJ / mol, providing a basis for the theoretical research and process optimization of LLDPE / EVA melt grafting AN.


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