| Abstract [eng] |
Photocross-linked polymers were obtain from three biobased monomers using 2,2‒ dimethoxy‒2‒phenylacetophenone as photoinitiator and without any organic solvent in the system. Acrylated soybean oil was the main biobased comonomer; vanillin dimethacrylate was used as a natural aromatic compound improving polymer thermal, mechanical, and rheological properties; myrcene was used as reactive diluent, which homogenizied monomer mixture, reduced viscosity and became a permanent part of polymer network. For comparison, analogous studies have been carried out with the synthetic stable aromatic compound divinylbenzene, often used as a synthetic cross-linking agent in polymer synthesis, which replaced vanillin dimethacrylate. It was determined that photopolymerization rate and properties of the cross-linked polymers depended on the amount of monomers in composition. Better viscosity and homogenisation of the system was obtained with increasing amount of myrcene, while the reduction of polymerization rate, worse mechanical and thermal properties were observed in such case. Higher amount of aromatic compound improved mechanical and thermal properties of polymers. It was determined that the replacement of divinylbenzene by vanillin dimethacrylate in the system led to the higher photopolymerization rate, higher amount of polymer insoluble fraction, better mechanical and thermal properties of polymers. |
