丙烯腈连续水相聚合宏观动力学模型

Macro Kinetic Models for Acrylonitrile Continuous Aqueous Polymerization

从丙烯腈水相聚合机理和成粒机理出发,根据Danckwerts-Zwietering的微观混合理论,分别建立了微观完全分离和最大混合的聚合动力学模型.利用连续搅拌釜式反应器中取得的转化率和数均聚合度数据进行模型计算,发现微观完全分离模型更适合于描述丙烯腈水相连续聚合过程.

The kinetic models of aqueous polymerization for acrykmitrile was established in terms of its polymerization mechanism and granulation mechanism. Two kinetic models of polymerization, corresponding to micromixing and macromixing respectively, were developed on the basis of the Danckwerts-Zwie-tering micromixing theory. The experimental data of conversion and number-average molecular weight, obtained from a continuous stirred-tank reactor, were used to check the two models. It was found that a micromixing kinetic model is more suitable for describing the process of acrylonitrile continuous polymerization in aqueous medium.