Synthesis and Characterization of Crosslinked Polyacrylates Containing Cubane and Silyl Groups

摘要

Attaching the organosilyl groups to macromolecular chains of 2-hydroxyethyl methacrylate (HEMA) should lead to important modifications of polymer properties.t-BuMe_2Si and cubane-1,4-dicarboxylic acid (CDA) were covalently linked with 2-hydroxyethyl methacrylate (HEMA).The silyl-linked HEMA is abbreviated as TSMA,while cubane-1,4-dicarboxylic acid (CDA) linked to two HEMA groups is the cross-linking agent (CA).Free radical cross-linking copolymerization of TSMA and HEMA with various ratios of CA as the cross-linking agent was carried out at 60-70 deg C.The compositions of the cross-linked,three-dimensional polymers were determined by FTIR spectroscopy.The glass transition temperature (T_g) of the network polymers was determined c'alorimetrically.The T_g of the network polymer increased with increasing cross-linking degree.