摘要
以小粒径聚二烯烃胶乳为主干胶乳,分别利用化学附聚、压力附聚和高分子附聚的方法合成大粒径胶乳,并采用相同的接枝聚合工艺对附聚后胶乳进行接枝聚合,考察了附聚后胶乳的粒径分布、静态稳定性、微观结构,分析了接枝后胶乳的特性参数。实验结果表明,化学附聚后胶乳粒子通过粒子间作用力黏附在一起形成大粒子,接枝率最高(98.8%);压力附聚是小粒径线性分子缠结重新融合形成大粒子,接枝率较低(97.1%),但可实现连续生产;高分子附聚是具有羧基团的高分子附聚剂与小粒子通过键能键合在一起形成的稳态大粒子,接枝稳定性最佳,未见宏观沉淀物。
Latexes with big particle size were prepared with polydiene latex with small particle size as main latex through chemical agglomeration,pressure agglomerate and polymer agglomeration separately,and then the graft polymerization of the agglomeration latexes was carried out with styrene and acrylonitrile as grafting reactants. The particle size distribution,static stability and microstructure of the agglomeration latexes were studied. The grafting ratio,free styrene-acrylonitrile copolymer content,particle size and dispersion coefficient of the grafted latexes were investigated. The experimental results showed that,the chemical agglomeration latex particles adhered together through interaction between the particles to form bigger particles,and its grafting ratio was the highest（98.8%）;the pressure agglomeration was by the entanglement of linear molecules with small particle size to form bigger particles with lower grafting ratio（97.1%）,but its continuous production could be realized;the polymer agglomeration was to form big stable particles by the linkage of polymer agglutinant with carboxyl groups and small particles,with the optimal grafting stability without macroscopic precipitate.
出处
《石油化工》
CAS
CSCD
北大核心
2016年第5期559-563,共5页
Petrochemical Technology
关键词
聚二烯烃胶乳
ABS附聚
化学附聚
高分子附聚
压力附聚
接枝聚合
polydiene latex
ABS agglomeration
chemical agglomeration
polymer agglomeration
pressure agglomeration
graft polymerization
