Synthesis of Monodispersed Poly(butyl acrylate)-silica Core-shell Particles

Abstract

Abstract: The core-shell particles consisting of poly(butyl acrylate)(PBA) core and silica shell were synthesized. The 3-methacryloxy propyl trimethoxysilane (MPS) was used as functional comonomer to modify the PBA latex particle surface with silanol(SiOH) groups via semicontinuous emulsion polymerization. The resulted emulsion was transferred into water/ethanol mixture without loss of stability and functionalized PBA latex was used as seeds for further silica shell growth. The coating process was achieved by Stber method, base-catalyzed hydrolysis and condensation of tetraethoxysilane(TEOS). The functionalized latex and core/shell particles were characterized by using differential thermal analysis(DTA), transmission electron microscope and light scattering. It has been confirmed that the PBA latex particles have been entirely enveloped with silica shell and the core/shell particles are monodisperse. The thickness of silica shell can be estimated by the size difference of functionalized PBA-SiO₂ core-shell particles.

Key words: Poly(butyl acrylate)-silica core/shell particles, Monodisperse system, Emulsion polymerization

CLC Number:

O631

TrendMD:

YANG Zhong-Qiang, LI Zhi-Ying, LI Dong-Mei, ZHANG Ming, LIU Feng-Qi . Synthesis of Monodispersed Poly(butyl acrylate)-silica Core-shell Particles[J]. Chem. J. Chinese Universities, 2004, 25(9): 1774.

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Synthesis of Monodispersed Poly(butyl acrylate)-silica Core-shell Particles

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