摘要
以十二烷基硫酸钠(SDS)为乳化剂,过硫酸钾(KPS)引发剂引发N-苯基马来酰亚胺/苯乙烯/丙烯腈/ɑ-甲基苯乙烯(PMI/St/AN/-ɑMeSt)进行四元乳液共聚,考察了聚合温度,引发剂浓度,乳化剂浓度,-ɑMeSt浓度对聚合速率的影响。结果表明,共聚体系的表观活化能为84.14 kJ/mol,聚合初始速率同引发剂浓度的0.46次方和乳化剂浓度的0.57次方成正比。乳化剂浓度8.4 m mol/L,引发剂浓度1.8m mol/L,聚合温度75℃,聚合1 h,85℃熟化2 h是较为合理的反应条件。-ɑMeSt的浓度对聚合速率有很大的影响,应控制在0.35 mol/L以下。
N-phenylmaleimide/styrene/acrylonitrile/α-methylstyrene emulsion copolymerization was studied using solium dodecyl sulfate （SDS） as emulsifier and potassium persulfate （KPS） as initiator. The effects of monomers ratio, reaction temperature, emulsifier and initiator concentration on the rate of copolymerization were investigated. It showed that the overall observed copolymerization activation energy of the system was 84.14kJ/mol; and the rate of copolymerization was positively proportion to the concentration of emulsifier to the power of 0.46 and to the concentration of initiator t the power of 0.57. For the emulsion copolymerization, the suitable reaction condition were： polymerizing for 1h at 75℃, aging for 2h at 85℃, SDS 8.4 mmol/L and KPS 1.8 mmol/L. The mole fracion of α-methylstyrene had a great influence on the reaction rate, should be controlled under 20%mol.
出处
《化学反应工程与工艺》
EI
CAS
CSCD
北大核心
2006年第1期74-77,共4页
Chemical Reaction Engineering and Technology
