| MMA/BA/聚乙二醇马来酸单酯钠盐无皂乳液聚合的成粒机理 |
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| 引用本文： | 张茂根,翁志学,黄志明,潘祖仁.MMA/BA/聚乙二醇马来酸单酯钠盐无皂乳液聚合的成粒机理[J].高等学校化学学报,1999,20(11):1800-1803. |
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| 作者姓名： | 张茂根 翁志学 黄志明 潘祖仁 |
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| 作者单位： | 浙江大学高分子科学与工程研究所, 杭州 310027 |
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| 摘 要： | 研究了在少量聚乙二醇马来酸单酯钠盐存在下,MMA/BA无皂乳液聚合成粒过程,发现聚合初期产生的初级粒子消失后,两次周期性地产生小粒子。经分析,是新的成核作用产生的,表明在聚合的中晚期,成核过程并未真正结束,而是处于成核-聚并的动态平衡之中。
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| 关 键 词： | 无皂乳液聚合 成粒机理 周期成核现象 |
| 收稿时间： | 1998-10-15 |
Particle Formation Mechanism in the Emulsifier-free Emulsion Polymerization of MMA/BA/Sodium Polyethylene Glycol Maleate |
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| ZHANG Mao-gen,WENG Zhi-Xue,HUANG Zhi-Ming,PAN Zu-Ren.Particle Formation Mechanism in the Emulsifier-free Emulsion Polymerization of MMA/BA/Sodium Polyethylene Glycol Maleate[J].Chemical Research In Chinese Universities,1999,20(11):1800-1803. |
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| Authors: | ZHANG Mao-gen WENG Zhi-Xue HUANG Zhi-Ming PAN Zu-Ren |
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| Institution: | Institute of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China |
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| Abstract: | The particle formation mechanism of MMA/BA emulsifier free emulsion polymerization in the presence of small amount of ZA 6 comonomer(sodium polyethylene glycol 600 maleate) was investigated with Coulter LS 230 laser particle size analyzer. After the primary particles of the early stage have vanished, new small particles were twice found periodically. It is believed to be formed by new nucleations by theoretical and data analyses and is called periodic nucleation phenomenon. It is suggested that the nucleation processes do not end really at the middle and later stages of the polymerization, and it is in the dynamic equilibrium of nucleation and aggregation. |
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| Keywords: | Emulsifier free emulsion polymerization Particle formation mechanism Periodic nucleation phenomenon |
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