摘要
建立了ＶＡｃ／ＭＭＡ半连续无种子乳液共聚合数学模型．通过数值模拟计算表明：ＶＡｃ／ＭＭＡ的成核以均相成核为主，与种子法比较，ＶＡｃ／ＭＭＡ无种子乳液共聚体系可选择相对较大的加料速率进行反应，而不致于导致反应末期的爆聚产生，另外，通过数值模拟考察了组分和操作参数对过程成核和反应动力学的影响．
A mathematical model of Vinyl Acetate(VAc) and Methyl Methacrylate (MMA) unseeded semicontinuous emulsion copolymerization is established. By solution to the model established above, it is shown that miscelle nucleation is much more important than homogeneous nucleation for the unseeded emulsion copolymerization of vinyl acetate(VAc) and methyl methacrylate(MMA). Compared with the seeded method, it is obtained by modeling that the higher feed rate can be selected to carry out the VAc/MMA unseeded emulsion copolymerization, which would not bring about the “explosive” polymerization at the end of the polymerization. In addition, the effects of the compositions and operating parameters on the nucleation and reaction kinetics of polymerization are studied by modeling. Both homogeneous and miscelle nucleations, the kinetics of shear coagulation and the effects of gel and glass state in the latex particles on the emulsion copolymerization are considered in the model.
出处
《东南大学学报（自然科学版）》
EI
CAS
CSCD
1998年第4期161-166,共6页
Journal of Southeast University：Natural Science Edition
关键词
醋酸乙烯
甲基丙烯酸甲酯
乳液共聚合
数值模拟
vinyl acetate
methyl methacrylate
unseeded emulsion copolymerization
mathematical modeling
