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Frontiers of Chemical Science and Engineering

ISSN 2095-0179

ISSN 2095-0187(Online)

CN 11-5981/TQ

Postal Subscription Code 80-969

2018 Impact Factor: 2.809

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Front. Chem. Sci. Eng.    2008, Vol. 2 Issue (2) : 127-134    https://doi.org/10.1007/s11705-008-0033-0
Dispersion of “guava-like” silica/polyacrylate nanocomposite particles in polyacrylate matrix
QI Dongming1, YANG Lei1, WU Minghua2, SHAO Jianzhong2, BAO Yongzhong3
1.Key Laboratory of Advanced Textile Materials and Manufacturing Technology, Ministry of Education, Zhejiang Sci-Tech University；State Key Laboratory of Chemical Engineering, Zhejiang University; 2.Key Laboratory of Advanced Textile Materials and Manufacturing Technology, Ministry of Education, Zhejiang Sci-Tech University; 3.State Key Laboratory of Chemical Engineering, Zhejiang University
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Abstract A series of “guava-like” silica/polyacrylate nanocomposite particles with close silica content and different grafting degrees were prepared via mini-emulsion polymerization using 3-(trimethoxysilyl)propyl methacrylate (TSPM) modified silica/acrylate dispersion. The silica/polyacrylate composite particles were melt-mixed with unfilled polyacrylate (PA) resin to prepare corresponding silica/polyacrylate molded composites and the dispersion mechanism of these silica particles from the “guava-like” composite particles into polyacrylate matrix was studied. It was calculated that about 110 silica particles were accumulated in the bulk of every silica/polyacrylate composite latex particle. Both the solubility tests of silica/polyacrylate composite latex particles in tetrahydrofuran (THF) and the section transmission electron microscope (TEM) micrographs of silica/polyacrylate molded composites indicated that the grafting degree of silica particles played a crucial role in the dispersion of silica/polyacrylate composite particles into the polyacrylate matrix. When the grafting degree of polyacrylate onto silica was in a moderate range (ca. 20%–70%), almost all of silica particles in these “guava-like” composite particles were dispersed into the polyacrylate matrix in a primary-particle-level. However, at a lower grafting degree, massive silica aggregations were found in molded composites because of the lack of steric protection. At a greater grafting degree (i.e., 200%), a cross-linked network was formed in the silica/polyacrylate composite particles, which prevented the dispersion of composite particles in THF and polyacrylate matrix as primary particles.
Issue Date: 05 June 2008
 Cite this article:   
WU Minghua,QI Dongming,BAO Yongzhong, et al. Dispersion of “guava-like” silica/polyacrylate nanocomposite particles in polyacrylate matrix[J]. Front. Chem. Sci. Eng., 2008, 2(2): 127-134.
 URL:  
https://academic.hep.com.cn/fcse/EN/10.1007/s11705-008-0033-0
https://academic.hep.com.cn/fcse/EN/Y2008/V2/I2/127
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