PREPARATION OF MONO-DISPERSED COLLOIDS OF P(ST-MMA-SPMAP) BY SOAP-FREE EMULSION COPOLYMERIZATION

YANG Linglu; CONG Hailin; CAO Weixiao

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PREPARATION OF MONO-DISPERSED COLLOIDS OF P(ST-MMA-SPMAP) BY SOAP-FREE EMULSION COPOLYMERIZATION

Research Article | 更新时间：2021-03-19

- PREPARATION OF MONO-DISPERSED COLLOIDS OF P(ST-MMA-SPMAP) BY SOAP-FREE EMULSION COPOLYMERIZATION
- Acta Polymerica Sinica Issue 2, Pages: 223-226(2005)
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- Published：20 April 2005，
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YANG Linglu, CONG Hailin, CAO Weixiao. PREPARATION OF MONO-DISPERSED COLLOIDS OF P(ST-MMA-SPMAP) BY SOAP-FREE EMULSION COPOLYMERIZATION. [J]. Acta Polymerica Sinica (2):223-226(2005)
DOI：

YANG Linglu, CONG Hailin, CAO Weixiao. PREPARATION OF MONO-DISPERSED COLLOIDS OF P(ST-MMA-SPMAP) BY SOAP-FREE EMULSION COPOLYMERIZATION. [J]. Acta Polymerica Sinica (2):223-226(2005) DOI：

摘要

利用无皂乳液聚合

分别用一步法和两步法合成了单分散的聚 (苯乙烯-甲基丙烯酸甲酯甲基丙烯酸丙基磺酸钾 ) (P(St-MMA-SPMAP))乳胶颗粒 .在该聚合体系中

当水溶性磺酸基单体SPMAP的浓度小于 17mmol/L时

为均相成核过程

能制备单分散的乳胶颗粒 .其中

用两步法制备的乳胶颗粒相互之间无粘连 .此外

还对一步法合成苯乙烯-甲基丙烯酸甲酯-甲基丙烯酸辛基磺酸钠(P(St-MMA-SOMAS))乳胶颗粒进行了初步研究.

Abstract

The mono-dispersed colloids of poly(styrene-methyl methacrylate-3-sulfopropyl methacrylate

potassium salt) P(St-MMA-SPMAP) were prepared with soap-free emulsion copolynmrization usinge a one-step or two-step method．The particle size decreases with increasing the SPMAP amount mainly due to the formation of more nucleus at higher concentration of SPMAP．Although homogeneous latex with narrow particle size dispersion can be obtained with the one-step method

the colloids prepared with this method are difficult to use in preparation of colloidal crystals because of heavy aggregation of the colloids．The two-step method can resolve this problem

the colloids prepared do not show any aggregation and are suitable to the preparation of colloidal crystals．A homogeneous nucleation is realized when the concentration of water．soluble monomer．SPMAP．is 1ess than 17mmol·dm-1 If 3-sulfooetyl-methacrylate

sodium salt (SOMAS) is used instead of SPMAP the mechanism of the emulsion polymerization becomes rather complex

because the SOMAS will play a role of emulsion agent and in this case the mono-dispersed colloids are difficult to be prepared．In this article the preparation of poly (styrene-methyl-methaerylate-3-sulfooctyl-methacrylate

sodium salt)P(St-MMA-SOMAS) colloids using a one-step method is also reported preliminary．

关键词

无皂乳液聚合单分散乳胶颗粒磺酸基单体一步法和两步法

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