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Polymerization rate and mechanism of ultrasonically initiated emulsion polymerization of n-butyl acrylate

文献类型： 外文期刊

作者： Xia, HS 1 ; Wang, Q 2 ; Liao, YQ 2 ; Xu, X 2 ; Baxter, SM 2 ; Slone, RV 2 ; Wu, SG 2 ; Swift, G 2 ; Westmoreland, DG 2 ;

作者机构： 1.Sichuan Univ, Polymer Res Inst, State Key Lab Polymer Mat Engn, Chengdu 610065, Peoples R China

2.Sichuan Univ, Polymer Res Inst, State Key Lab Polymer Mat Engn, Chengdu 610065, Peoples R China; Rohm & Haas Co, Res Labs, Spring House, PA 19477 USA

关键词： ultrasonic irradiation;emulsion polymerization rate;n-butyl acrylate

期刊名称：ULTRASONICS SONOCHEMISTRY （ 影响因子：7.491； 五年影响因子：7.537 ）

ISSN： 1350-4177

年卷期： 2002 年 9 卷 3 期

页码：

收录情况： SCI

摘要： The factors affecting the induction period and polymerization rate in ultrasonically initiated emulsion polymerization of n-butyl acrylate (BA) were investigated. The induction period takes only an instant in ultrasonically initiated emulsion polymerization of BA without any added initiator by enhancing the N-2 flow rate. Increasing temperature, power output and SDS concentration, decreasing the monomer concentration results in further decreasing induction period and enhanced polymerization rate. Under optimized reaction conditions the conversion of BA reaches 92% in 11 min. The polymerization rate can be controlled by varying reaction parameters, The apparatus of ultrasonically initiated semi-continuous and continuous emulsion polymerization were set up and the feasibility was first studied. Based on the experimental results, a free radical polymerization mechanism for ultrasonically initiated emulsion polymerization was proposed. including the sources of the radicals, the process of radical formation, the locus of polymerization and the polymerization process. Compared with conventional emulsion polymerization, where the radicals come from thermal decomposition of a chemical initiator, ultrasonically initiated emulsion polymerization has attractive features such as no need for a chemical initiator, lower reaction temperature, faster polymerization rate, and higher molecular weight of the polymer prepared. (C) 2002 Elsevier Science B.V. All rights reserved.

  • 相关文献

[1]Ultrasonically initiated emulsion polymerization of n-butyl acrylate. Wang, Q,Xia, HS,Liao, YQ,Xu, X,Baxter, SM,Slone, RV,Wu, SG,Swift, G,Westmoreland, DG.

[2]Polystyrene/Fe(3)O(4)magnetic emulsion and nanocomposite prepared by ultrasonically initiated miniemulsion polymerization. Qiu, Guihua,Wang, Qi,Wang, Chao,Lau, Willie,Guo, Yili. 2007

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