Synthesis and Characterization of Organic-Inorganic Polyacrylate-Silica Nanocomposites

Document Type : Research Paper

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Abstract

In this article, hybrid organic-inorganic materials were prepared by free radical copolymerization of 2-hydroxyethyl methacrylate (HEMA) and 3-methacryloxy-propyltrimethoxysilane (MPTMS) via sol-gel process. The methoxysilane-containing copolymer precursors were synthesized at different compositions. These copolymer precursors were then hydrolyzed and condensed to produce PHEMA-SiO2 nanocomposites. The samples were characterized by FTIR spectra and TGA thermograms. Optical properties and hardness were measured by visible spectroscopy and Shore D, respectively.
Morphological characteristics were investigated with SEM images and finally the formation and distribution of nano SiO2 particles were characterized by AFM images. FTIR spectra showed the formation of silica bonds (Si-O-Si) and TGA thermograms showed high thermal resistance up to 340oC for hybrid samples. Also samples possessed very good transparency in visible  avelength range. Microscopical images showed the existence and suitable distribution of nano silica particles.

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Iranian Journal of Polymer Science and Technology
Volume 20, Issue 4 - Serial Number 4
September and October 2007
Pages 381-390

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