| Abstract [eng] |
The most commonly used materials for double curing are synthetic, derived from petroleum products, the process generates large amounts of biologically stable waste and requires non-renewable raw materials. For this reason, there is a great need to create compositions of natural origin suitable for effective double curing. Vegetable oils are low cost, low toxicity and biodegradable materials. During the project, polymers consisting of acrylated epoxidized soybean oil, epoxidized linseed oil, epoxidized camelina oil and xylylenediamine fragments have been obtained by the double curing combining radical photopolymerization and thermal cationic polymerization. The kinetics of double curing was investigated. Increasing the amount of acrylated epoxidized soybean oil in the mixture increases the reaction rate and rigidity of the resulting polymers. The rigidity of epoxidized linseed oil-based polymers is higher than that of epoxidized camelina oil-based polymers. Studies of the mechanical properties of polymers have shown that increasing the amount of epoxidized oil in polymers decreases the values of Young's modulus and tensile strength, but increases the values of elongation at break and makes the polymers more elastic. Polymer structure studies have shown that polymers with the higher content of acrylated epoxidized soybean oil produce the higher amount of gel fraction and higher cross-linking density. The second curing step improves the rheological and mechanical properties of the resulting polymers. After studying the thermal properties of the polymers, it was found that the polymers are amorphous and have a high thermal stability. |
