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Citation: ZHANG Kai, HUANG Chunbao, SHEN Huifang, CHEN Huanqin. Structure and Morphology of Polychloroprene-Polymethylmethacrylate Composite Latex Particles[J]. Chinese Journal of Applied Chemistry, ;2012, 29(10): 1111-1116. doi: 10.3724/SP.J.1095.2012.00522 shu

Structure and Morphology of Polychloroprene-Polymethylmethacrylate Composite Latex Particles

  • 1.

    a School of Chemistry and Life Science, Hubei Key Laboratory of Economic Forest Germplasm Improvement and Resources Comprehensive Utilization, Huanggang Normal University, Huangzhou 438000, China;

  • 2.

    b School of Chemical and Energy Engineering, South China University of Technology, Guangzhou 510640, China

  • Corresponding author: ZHANG Kai, 
  • Received Date: 25 November 2011
    Available Online: 26 March 2012

    Fund Project: 湖北省自然科学基金面上项目(2010CDZ065) (2010CDZ065)黄冈师范学院博士基金项目(09CD156) (09CD156)

  • Polychloroprene-polymethylmethacrylate(PCR-PMMA) composite latex particles have been prepared through the seed emulsion polymerization with polychloroprene latex(Pa) and methyl methacrylate(Pb) as the seed and monomer,respectively.Thermodynamic analysis results showed that when Φb(volume fraction of polymer b)0.69,the Pa-Pb core-shell latex particles and(Pa+Pb) separated latex particles were formed;while when Φb0.69,the inverted Pb-Pa core-shell latex particles and Pa-Pb core-shell latex particles were formed.Kinetic analysis results showed that the initiator type,the monomer feed type,crosslinking of the seed latex particles,and the monomer-to-rubber ratios were major factors influencing the particle morphology.When potassium persulfate was used as the initiator,the monomer-starved conditions led to the formation of normal core-shell particles,whereas flooded-feed MMA could not favor in formation of typical core-shell particle.While when azobisisobutyronitrile(AIBN) was used as the initiator,it led to the formation of inverted core-shell particles no matter if monomer-starved or flooded condition was used.Crosslinking of the polychloroprene seed particles was found to favor to form obvious core-shell PCR-PMMA particles.With the monomer-to-rubber ratio increasing,the shell layer turned thicker,the composite latex particle still showed core-shell structure,which was in agreement with the predicted results of thermodynamic analysis.The inverted core-shell PCR-PMMA composite latex particles were gradually changed to interpenetrating structure as the amount of monomer was increased when AIBN was used.
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