Preparation and application of cross-linked core-shell PBA/PS and PBA/PMMA nanoparticles |
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Authors: | Zhong Zeng Jian Yu Zhaoxia Guo Ying Li |
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Institution: | (1) Institute of Polymer Science and Engineering, Department of Chemical Engineering, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China |
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Abstract: | This paper reports the preparation of cross-linked core-shell poly(butyl acrylate)/polystyrene (PBA/PS) and poly(butyl acrylate)/poly(methyl
methacrylate) (PBA/PMMA) nanoparticles via seeded emulsion polymerization and their application in nylon-based composites.
A highly cross-linked structure was formed in both the cores and the shells by using a cross-linking agent, which could prevent
the migration of hydrophobic PS shells to the inside of particles. There were covalent bonds on the interfaces between the
cores and the shells of both particles. The average particle sizes were 40–50 nm, and the size distributions were narrow.
The kinetics of polymerization was investigated. Well-defined core-shell structure and narrow particle size distribution could
be achieved under starved conditions of monomer feeding. Furthermore, PBA/PMMA particles were used to fill nylon 6, good dispersion
was obtained because of the strong interfacial interaction between the nanoparticles and the nylon 6 matrix and the good deformation
ability of nanoparticles, and the toughness and rigidity of the composites were improved evidently.
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Translated from Acta Polymerica Sinica, 2005, (6) (in Chinese) |
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Keywords: | seeded emulsion polymerization crosslink core-shell starved conditions of feeding |
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