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Citation: ZHANG Xing, ZHENG Yuying, CHEN Dexian. Preparation of Micrometer Core-shell Composite Particles via Dispersion Polymerization[J]. Chinese Journal of Applied Chemistry, ;2012, 29(1): 37-40. doi: 10.3724/SP.J.1095.2012.00036 shu

Preparation of Micrometer Core-shell Composite Particles via Dispersion Polymerization

1.
Institute of Polymer Science & Technology, College of Chemistry & Chemical Engineering, Fuzhou University, Fuzhou 350108, China

Corresponding author: ZHENG Yuying,
Received Date: 19 January 2011
Available Online: 14 March 2011
Fund Project: 国家科技部科技人员服务企业项目(292009GJC40029) (292009GJC40029)福建省科技计划重大专项专题项目(2007HZ0001-2) (2007HZ0001-2)福建省科技创新平台建设计划项目(2010H2005) (2010H2005)

Narrow dispersed CaCO₃/poly(styrene-co-n-butylacrylate)(CaCO₃/P(St-co-nBA)) composite particles with average diameter of 1.76 μm were obtained via a dispersion copolymerization of St and nBA in the presence of stearic acid modified nano-CaCO₃ particles.The products were characterized by transmission electron microscopy(TEM),optical microscope(OM),fourier transfer infrared spectroscopy(FT-IR),thermogravimetric analysis(TGA),and X-ray diffraction(XRD).The TEM images indicated the composite particles had nano-CaCO₃ core and P(St-co-nBA) shell structure.The TGA analysis results of composite particles before and after being extracted with dimethylbenzene showed the thermal decomposition temperature of the cladding polymer was higher than that of pure copolymer P(St-co-nBA),and some copolymer couldn't be extracted.The FT-IR spectra also confirmed the existence of copolymer on the composite particles after extracting.It suggested that the copolymer had chemical bonding with nano-CaCO₃.The mass proportion of P(St-co-nBA) which couldn't be extracted with accounted for 6.6% based on the mass of nano-CaCO₃.
- nano-CaCO₃,
- dispersion polymerization,
- encapsulation,
- composite
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