کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1251460 | 1496067 | 2006 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Synthesis and Characterization of Polystyrene/Nanosilica Organic-Inorganic Hybrid1
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
A polystyrene (PS)/nanosilica organic-inorganic hybrid material was prepared from styrene monomer and commercial aqueous silica sol containing large amounts of Si-OH by means of emulsion polymerization. The nanosilica sol was modified by the addition of the reactive coupling agent methacryloxy propyltrimethoxysilane (MPS), and the resulting latex particles were protected by surfactants such as sodium dodecyl sulphonate (SDS), hydroxypropyl methyl cellulose (HMPC), and poly (vinylpyrrolidone) (PVP). The effects of the type of surfactant, the amount of surfactant, and the coupling agent on the shape and stability of the resulting latex particles were investigated. The TEM observation indicates that among SDS, HMPC, and PVP, SDS is the best surfactant. When the content of SDS is 0.5% and the amount of MPS is 7% in the system, the latex with obvious core-shell structure could be obtained. The average diameters of the monodispessed particles range from 182 to 278 nm, and the average number of silica beads for each composite are 1325 and 4409, respectively. The FTIR analysis shows that PS was chemically linked to silica through MPS. The thermal gravimetric analysis shows that when there is a higher silica content, the hybrid composites have a better heat resistance.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Research in Chinese Universities - Volume 22, Issue 6, November 2006, Pages 797-802
Journal: Chemical Research in Chinese Universities - Volume 22, Issue 6, November 2006, Pages 797-802
نویسندگان
YUAN Wang-zhang, PENG Mao, YU Qiu-ming, TANG BEN-zhong, ZHENG Qiang,