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Citation: XU Guo-Cai, MA Jia-Ju, XING Hong-Long, HU Nai-Ming. Properties of Silica/polymer Nanocomposites Prepared via in situ Ultraviolet Curing in Dispersion[J]. Chinese Journal of Applied Chemistry, ;2000, 17(4): 450-452. shu

Properties of Silica/polymer Nanocomposites Prepared via in situ Ultraviolet Curing in Dispersion

1.
Department of Chemical Engineering, Huainan Institute of Technology, Huainan 232001

Received Date: 22 November 1999
Available Online: 15 March 2000
Fund Project: 安徽省教育委员会科研基金项目(99j10196) (99j10196)

The silica/polymer nanocomposites were obtained via in situ ultraviolet light irra diation of the dispersion system containing epoxylacrylate, aminoacrylate, 1,6-hexanediol diacry late, sensitizer 1173 and 20 nm silica particles. The results showed that the hardness, tensile strength and modulus of the nanocomposites were increased with increasing silica content. The silica nanocomposite with 2.5%(wt) of silica had pencil hardness of grade 6, tensile strength of 50 MPa and modulus of 1640 MPa. The initial thermal decomposition temperature of the nanocomposite was increased considerably at <400 K and decreased at >600 K. The thermal decomposition loss was 83.4% at near 800 K. The nanocomposites showed a strong ultraviolet absorbency in region of 200~400 nm and the absorbency at 400~800 nm increased with increasing silica content. the transmittance at 400 nm was 25% and fluorescence at 700 nm was observed when the composite was excited with 365 nm wave.
- SiO₂,
- polyacrylate,
- nanocomposite,
- ultraviolet curing
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