Effect of Monomer Feeding Mode on the Preparation of Hollow Latexes with High MAA Content in the Core Latex Preparation

Citation: Yi-ming Jiang, Bo-tian Li, Wei Deng, Xue-yan Li, Cheng-you Kan. Effect of Monomer Feeding Mode on the Preparation of Hollow Latexes with High MAA Content in the Core Latex Preparation[J]. Chinese Journal of Polymer Science, 2014, 32(1): 21-28. doi: 10.1007/s10118-014-1391-3 shu

Effect of Monomer Feeding Mode on the Preparation of Hollow Latexes with High MAA Content in the Core Latex Preparation

1.
Department of Chemical Engineering and Key Laboratory of Advanced Materials of Ministry of Education, Tsinghua University, Beijing 100084, China
2.
Beijing Eastern Acrylic Chemical Technology Co. Ltd., Beijing 101149, China

摘要: In order to prepare hollow latex particles with optimum morphology based on osmotic swelling principle, three-layer core/shell latex particles with 40 wt% MAA in the core were first prepared via multistep seeded emulsion copolymerization, in which monomers were added by a semi-continuous process with monomer addition under two different forms: pure monomers' mixture (monomer addition), and pre-emulsified monomers (pre-emulsion addition). Then, the hollow latex particles with different morphologies were obtained after alkali post-treatment. Influences of the monomer feeding mode on the emulsion polymerization and the particle morphology were investigated. Results showed that the pre-emulsion addition could significantly improve the polymerization stability in each step, and greatly enhance the uniformity of shell encapsulation. The sizes of the core and core/shell latex particles obtained by the pre-emulsion addition were smaller and more uniform than those synthesized by the monomer addition, and the hollow latex particles with intact morphology were generated by alkali post-treating of the core/shell latexes prepared from the pre-emulsion addition. As the core size increased, the morphology of the post-treated particles underwent evolution from hollow to collapse. Moreover, the mechanism of the particle morphological evolution was proposed.

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English

Effect of Monomer Feeding Mode on the Preparation of Hollow Latexes with High MAA Content in the Core Latex Preparation

1.
Department of Chemical Engineering and Key Laboratory of Advanced Materials of Ministry of Education, Tsinghua University, Beijing 100084, China
2.
Beijing Eastern Acrylic Chemical Technology Co. Ltd., Beijing 101149, China
Received Date: 15 January 2013
Revised Date: 21 February 2013
Available Online: 05 January 2014

Abstract: In order to prepare hollow latex particles with optimum morphology based on osmotic swelling principle, three-layer core/shell latex particles with 40 wt% MAA in the core were first prepared via multistep seeded emulsion copolymerization, in which monomers were added by a semi-continuous process with monomer addition under two different forms: pure monomers' mixture (monomer addition), and pre-emulsified monomers (pre-emulsion addition). Then, the hollow latex particles with different morphologies were obtained after alkali post-treatment. Influences of the monomer feeding mode on the emulsion polymerization and the particle morphology were investigated. Results showed that the pre-emulsion addition could significantly improve the polymerization stability in each step, and greatly enhance the uniformity of shell encapsulation. The sizes of the core and core/shell latex particles obtained by the pre-emulsion addition were smaller and more uniform than those synthesized by the monomer addition, and the hollow latex particles with intact morphology were generated by alkali post-treating of the core/shell latexes prepared from the pre-emulsion addition. As the core size increased, the morphology of the post-treated particles underwent evolution from hollow to collapse. Moreover, the mechanism of the particle morphological evolution was proposed.

Key words:

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Effect of Monomer Feeding Mode on the Preparation of Hollow Latexes with High MAA Content in the Core Latex Preparation

English

Effect of Monomer Feeding Mode on the Preparation of Hollow Latexes with High MAA Content in the Core Latex Preparation

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Effect of Monomer Feeding Mode on the Preparation of Hollow Latexes with High MAA Content in the Core Latex Preparation

English

Effect of Monomer Feeding Mode on the Preparation of Hollow Latexes with High MAA Content in the Core Latex Preparation

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

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