在无机分散剂存在下苯乙烯悬浮聚合宏观成粒的特征

CIESC Journal

在无机分散剂存在下苯乙烯悬浮聚合宏观成粒的特征

方仕江,潘仁云,周其云,唐舜英,袁惠根

浙江大学高分子科学与工程研究所,浙江大学高分子科学与工程研究所,浙江大学高分子科学与工程研究所,浙江大学高分子科学与工程研究所,浙江大学高分子科学与工程研究所杭州310027 ,杭州310027 ,杭州310027 ,杭州310027 ,杭州310027

出版日期:1993-12-25 发布日期:1993-12-25

THE CHARACTERISTICS OF PARTICLE FORMATIONIN STYRENE SUSPENSION POLYMERIZATION IN THEPRESENCE OF INORGANIC DISPERSANT

Fang Shijiang, Pan Renyun, Zhou Qiyun, Tang shunying and Yuan Huigen (Institute of Polymer Science & Engineering, Zhejiang University, Hangzhou 310027)

Online:1993-12-25 Published:1993-12-25

摘要/Abstract

摘要： 以苯乙烯悬浮聚合为体系,考察羟基磷酸钙(HAP)或HAP与聚乙烯醇(PVA)复合为分散剂体系时,各种因素如分散剂浓度、油水比、搅拌速度等与瞬时液滴大小及分布之间的关系,并分析讨论瞬时液滴分散、合并的过程特征.结果表明,悬浮苯乙烯液滴聚合宏观成粒的特征与分散剂的分散机理无关,仅体现液滴分散、合并的过程特点.当采用分批加分散剂时,实验观察到瞬时液滴大小分布呈由单峰过渡到双峰,再发展成单峰分布的特征,从而找出了以分批加分散剂方式制备窄分布聚合物颗粒的理论依据.

Abstract: Inorganic hydroxyapatite (HAP) and its mixture with polyvinylalcohol (PVA) used as a dispersant system in styrene suspension polymerization, the effects of dispersed phase ratio, the concentration of HAP and stirring speed on the formation of polymer particle were examined experimentally. The characteristics of coalescence and breakup of droplets were analyzed in particular. The results showed that the growth of suspension styrene droplets was independent of the dispersing mechanism of stabilizer but was a process of coalescence and breakup of droplets. The growth of droplets could be controlled by adjusting the way of adding dispersant during polymerization. It was observed that droplet size distribution changed from single - peaked to bimodal distribution and then back to single - peaked distribution with the dispersant added in two batches. These results will help to produce suitably sized polymer particle with a narrower size distribution.

方仕江,潘仁云,周其云,唐舜英,袁惠根. 在无机分散剂存在下苯乙烯悬浮聚合宏观成粒的特征 [J]. CIESC Journal.

Fang Shijiang, Pan Renyun, Zhou Qiyun, Tang shunying and Yuan Huigen (Institute of Polymer Science & Engineering, Zhejiang University, Hangzhou 310027). THE CHARACTERISTICS OF PARTICLE FORMATIONIN STYRENE SUSPENSION POLYMERIZATION IN THEPRESENCE OF INORGANIC DISPERSANT[J]. .