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Studies on UV‐stability of poly(MMA‐co‐M12‐co‐BPMA)/TiO 2 composite particles prepared by ultrasonically initiated emulsion polymerization
Author(s) -
Zou Jiangpeng,
Jiang Long,
Nguyen Thien Phap,
Dan Yi
Publication year - 2010
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.1473
Subject(s) - materials science , emulsion polymerization , methyl methacrylate , emulsion , polymer chemistry , polymerization , comonomer , composite number , chemical engineering , composite material , polymer , engineering
In this paper, poly(methyl methacrylate‐co‐sodium sulfopropyl lauryl maleate‐co‐2‐hydroxy‐4‐(3‐methacryloxy‐2‐hydroxylpropoxy) benzophenone)/TiO 2 (i.e., poly(MMA‐co‐M12‐co‐BPMA)/TiO 2 ) composite particles were prepared by ultrasonically initiated emulsion polymerization. To study the dispersion and UV‐stability of the composite particles, laser diffraction particle size analyzer (LDPSA), ultraviolet‐visible absorption spectroscopy (UV‐vis), UV‐vis diffuse reflectance spectroscopy (DRS), differential scanning calorimeter (DSC), and the weight loss measurement were used. The results indicate that the dispersion of the poly(MMA‐co‐M12‐co‐BPMA)/TiO 2 composite particles prepared by ultrasonically initiated emulsion polymerization is good. And the composite particles can absorb UV light; the ultraviolet absorption strength of poly(MMA‐co‐M12‐co‐BPMA) grafted onto the surface of TiO 2 has not changed after UV irradiation while that of PMMA changed significantly. The UV absorption strength, weight loss, and Tg changes are in the order PMMA> poly(MMA‐co‐M12‐co‐BPMA) >PMMA grafted onto TiO 2 > poly(MMA‐co‐M12‐co‐BPMA) grafted onto TiO 2 . These results show that the ultrasonically initiated emulsion polymerization will enhance the UV stability of composite particles, and the UV‐stability of PMMA can be enhanced by the introduction of the organic UV‐stabilizer BPMA and the inorganic UV‐stabilizer titanium dioxide into the PMMA chains by covalent bond, and the effect of the BPMA and the TiO 2 used together is better than that used, respectively. Copyright © 2009 John Wiley & Sons, Ltd.