Emulsion Copolymerization of MMA/BA in the Presence of Surface Active Monomers(Ⅱ)——Kinetics and Polymerization Mechanism

Abstract

Abstract: The effects of the amount of surface-active monomers [sodium sulfonated lauryl(allyl glyceryl) succinate, ZC-L] on the polymerization rate and latex particle size in MMA/BA emulsion copolymerization were investigated. The change of average particle size and particle size distribution during the polymerization process was determined with Coulter LS 230 laser particle size analyzer, and compared with those of MMA/BA emulsion polymerization in the presence of sodium dodecyl benzene sulfonate and MMA/BA emulsifier-free emulsion polymerization. The nucleation mechanism is believed to be homogeneous nucleation when [ZC-L]<CMC, and the particles formed are stabilized by the coagulation of the particles each other to increase the surface charge density; the nucleation mechanisms include homogeneous nucleation and micelle nucleation when [ZC-L]>CMC, and the particles are stabilized by absorption of surfmers from the system.

Key words: Acrylate, Emulsion polymerization, Surface active monomer, Kinetis, Mechanizm

CLC Number:

TQ316.334

TrendMD:

ZHANG Mao-Gen, WENG Zhi-Xue, HUANG Zhi-Ming, PAN Zu-Ren . Emulsion Copolymerization of MMA/BA in the Presence of Surface Active Monomers(Ⅱ)——Kinetics and Polymerization Mechanism[J]. Chem. J. Chinese Universities, 2000, 21(1): 148.

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Emulsion Copolymerization of MMA/BA in the Presence of Surface Active Monomers(Ⅱ)——Kinetics and Polymerization Mechanism

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