PREPARATION OF POROUS PMMA RESIN BY A NEW EMULSION POLYMERIZATION PROCESS AND THE MECHANISM OF PARTICLE FORMATION

BAO Yongzhong; ZHU Qin; HUANG Zhiming; WENG Zhixue

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PREPARATION OF POROUS PMMA RESIN BY A NEW EMULSION POLYMERIZATION PROCESS AND THE MECHANISM OF PARTICLE FORMATION

Research Article | 更新时间：2021-03-19

- PREPARATION OF POROUS PMMA RESIN BY A NEW EMULSION POLYMERIZATION PROCESS AND THE MECHANISM OF PARTICLE FORMATION
- Acta Polymerica Sinica Issue 2, Pages: 232-235(2004)
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- Published：20 April 2004，
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BAO Yongzhong, ZHU Qin, HUANG Zhiming, WENG Zhixue. PREPARATION OF POROUS PMMA RESIN BY A NEW EMULSION POLYMERIZATION PROCESS AND THE MECHANISM OF PARTICLE FORMATION. [J]. Acta Polymerica Sinica (2):232-235(2004)
DOI：

BAO Yongzhong, ZHU Qin, HUANG Zhiming, WENG Zhixue. PREPARATION OF POROUS PMMA RESIN BY A NEW EMULSION POLYMERIZATION PROCESS AND THE MECHANISM OF PARTICLE FORMATION. [J]. Acta Polymerica Sinica (2):232-235(2004) DOI：

摘要

采用以水相为分散相、甲基丙烯酸甲酯 (MMA) 环己烷混合物为连续相的新型乳液聚合制备PMMA树脂 .发现

在未加乳化剂和加入少量Tween20乳化剂时

均可制备由初级粒子凝聚而成、无明显皮膜结构的疏松PMMA粒子

初级粒子粒径小于环己烷存在下MMA悬浮聚合得到的PMMA粒子的初级粒子.根据聚合体系相构成、PMMA在MMA 环己烷混合液的溶解性及PMMA粒子粒径分布和形态的演变

提出了在分散水滴内乳液聚合形成初级粒子-生长-凝聚的新型乳液聚合成粒机理.

Abstract

A new emulsion polymerization process

in which water acted as the dispersed phase and the mixture of methyl methacrylate (MMA) and cyclohexane as the continuous phase

was applied to prepare PMMA resin．It showed that porous PMMA particles composed of aggregated primary particles were prepared by the new polymerization process．The size of these primary particles was smaller than that of the primary particles of PMMA resin prepared by MMA suspension polymerization in the presence of cyclohexane．According to the phase structure of the initial polymerization system．the solubility of PMMA in the mixture of MMA and cyclohexane and the variations of particle size distribution and morphology of PMMA resin

a particle formation mechanism of the new polymerization was pmposed

covering the formation and grouth of primary particles and their coagulation in the dispersed water droplets．

关键词

甲基丙烯酸甲酯环己烷乳液聚合颗粒形态成粒机理

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