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Graft Copolymerization of Styrene and Acrylonitrile in the Presence of Poly(propylene glycol): Kinetics and Modeling.  
Graft Copolymerization of Styrene and Acrylonitrile in the Presence of Poly(propylene glycol): Kinetics and Modeling.
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关键词: 接枝聚合物  苯乙烯  丙烯腈  聚醚  动力学  模型  
资料大小: 426k
所属学科: 高分子工程
来源: 来源网络
简介:
A heterogeneous polymerization model, including an initial solution polymerization modeland a later two-phase polymerization model, is developed to describe graft free-radicalcopolymerization of styrene and acrylonitrile in the presence of poly(propylene glycol).The diffusion-controlled termination, initiation,propagation, and transfer in the dispersed phaseare considered reasonably. The model describesthe polymeriztion kinetics well. The mainpolymerization locus shifts from the continuousphase into the dispersed phase at monomer conversionof 0.03–0.05, leading to sharp increase inpolymerization rate and molecular weight,decrease in graft efficiency and broadening ofthe MWD.
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