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The polyacrylic acid (PAA)/silica nanocomposite hydrogels with high mechanical property were prepared by combining sol-gel process and in situ free radical polymerization using 3-methacryloxypropyltrimethoxysilane (MPTMS) as silane and acrylic acid… Click to show full abstract
The polyacrylic acid (PAA)/silica nanocomposite hydrogels with high mechanical property were prepared by combining sol-gel process and in situ free radical polymerization using 3-methacryloxypropyltrimethoxysilane (MPTMS) as silane and acrylic acid (AA) as monomers. The structure-property relationship of nanocomposite hydrogels was characterized by FT-IR, DMA, TGA, XRD, TEM, and static mechanical testing. The dependence of mechanical property on the network parameter was investigated. The elastic modulus and compression fracture stress of PAA/silica nanocomposite hydrogels reached 1.27 and 1.35 MPa at molar ratio of MPTMS to AA of 0.034. The enhancement of mechanical property was attributed to the multiple cross-linking networks between MPTMS and AA by covalent bonding and hydrogen bonding. POLYM. COMPOS., 2017. © 2017 Society of Plastics Engineers
Journal Title: Polymer Composites
Year Published: 2018
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