Abstract Polymer materials, not described in the literature so far, were obtained in the process of UV polymerization between methacrylic monomer obtained on the basis of natural, terpene alcohol: citronellyl methacrylate and benzyl methacrylate with different composition. The structures of the novel, environmentally friendly copolymers were confirmed by the FTIR and 13C CPMAS/NMR spectra. The copolymers containing more than 50% mass of citronellyl methacrylate were characterized by a high conversion of the double bonds determined on the basis of the FTIR and NMR spectra (95–96% and 92–94%, respectively). The novel materials were highly resistant to polar and non-polar solvents and the chemical stability. The glass transition temperature was from 15.8 to 19.9 °C which confirms that the obtained materials are elastomers at room temperature. Their thermal stability depended on their composition. It was from 185 to 205 °C (inert conditions) and from 149 to 214 °C (oxidizing conditions). TG/FTIR/QMS studies confirmed that their decomposition took place mainly as a depolymerization process combined with a subsequent breaking of the bonds in the resulting monomer/s at higher temperatures, which led to the formation of the gases with lower molecular masses. The main decomposition products emitted in an inert atmosphere were benzyl methacrylate, citronellyl methacrylate, 2-methylpropenal, citronellal and higher molecular mass compounds formed as a result of radical reactions between intermediate volatile products. In turn, under oxidizing conditions, as volatiles, benzyl methacrylate, citronellyl methacrylate, 2-methylpropenal, citronellal and small amounts of inorganic gases (CO, CO2, H2O) as a result of depolymerization and some combustion processes of the residues were indicated.
展开▼
