Dynamics and M echanism of Ultrasonic-Assisted Emulsion Polymerization of Vinyl Acetate

Journal of South China University of Technology (Natural Science Edition) ›› 2006, Vol. 34 ›› Issue (12): 83-87.

• Chemistry,Chemical & Energy Engineering • Previous Articles Next Articles

Dynamics and M echanism of Ultrasonic-Assisted Emulsion Polymerization of Vinyl Acetate

Hou Hui-Yu Tu Wei-Ping

Schol of Chemical and Energy Engineering,South China Univ.of Tech.,Guangzhou 510640,Guangdong,China

Received:2005-01-04 Online:2006-12-25 Published:2006-12-25
Contact: 侯慧玉(1976-) , 女, 博士生, 主要从事高分子乳液聚合研究. E-mail:houhuiyu@ tom. com
About author:侯慧玉(1976-) , 女, 博士生, 主要从事高分子乳液聚合研究.

Abstract

Abstract:

In order to improve the reaction rate and monomer conversion of the polymerization of vinyl acetate,PO-tassium persulfate and sodium dodecyl sulfate were used respectively as the initiator an d the emulsifier to produce poly-vinyl acetate by means of pre-emulsification intermittent polymerization.The efects of ultrasonic power,initiator dosage,emulsifier dosage,monomer dosage and reaction temperature on the reaction rate of the ultrasonic-assis-ted emulsion polymerization were then studied.Furtherm ore,the mechan ism of the ultrasonic-assisted emulsion-po ly-merization was discussed,and the approaches of ultrasonic to afect the polymerization were analyzed.Th e results show that,in the experimental conditions of the present study,ultrasonic radiation helps to improve the polymerization rate an d the monomer conversion,and may result in an apparent activation energy of 51.55 kJ/mol.

Key words: ultrasonic, emulsion polymerization, dynamics, reaction mechan ism

Hou Hui-Yu Tu Wei-Ping. Dynamics and M echanism of Ultrasonic-Assisted Emulsion Polymerization of Vinyl Acetate[J]. Journal of South China University of Technology (Natural Science Edition), 2006, 34(12): 83-87.

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Dynamics and M echanism of Ultrasonic-Assisted Emulsion Polymerization of Vinyl Acetate

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