PP固相接枝GMA微观聚合动力学研究

Research on the Microscopic Polymerization Kinetics of Glycidyl Methacrylate Solid-phase Grafted onto Polypropylene

基于聚丙烯(PP)固相接枝聚合的终止反应主要是自由基单基终止反应的假设提出相应的接枝聚合机理,并建立聚合速率模型。实验考察了PP接枝甲基丙烯酸缩水甘油酯(GMA)体系单体浓度、引发剂浓度、聚合温度与聚合初期接枝速率的依赖关系。结果表明:初始聚合速率与单体浓度呈1.57次方、与引发剂浓度呈0.48次方关系,与聚合温度关系服从Arrhenius方程,并求得接枝反应的表观活化能Ea为86.63kJ/mol。

Based on the assumption that single radical termination is the main way of termination reaction of radical solid phase graft polymerization, the graft polymerization mechanism and the graft polymerization rate model were proposed. The effects of monomer concentration, initiator concentration, and temperature on the polymerization rate during GMA grafting onto PP were investigated. The results show that： the initial polymerization rate is 1.57 power of monomer concentration, and is 0.48 power of initiator concentration, the polymerization rate and temperature obeys Arrhenius equation. The value of the apparent reactive energy （Ea） is 86.63 kJ/mol.