Abstract
The methods of equilibrium swelling, the nominal equilibrium elasticity modulus and scanning calorimetry have been used to study the dependence of the density of network structure and the glass transition point on the composition of a composite material based on the diacrylic esters of epoxydiane resins with M=400–1000 and polyisocyanate. During UV curing the structure of the polymers is accompanied by formation of microheterogeneities due to the different rate of conversion of the unsaturated bonds and free isocyanate groups with an important effect on the changes in the physicomechanical properties of the cured materials. An excess of polyisocyanate enhances microaggregation with formation of an inhomogeneous network with local regions of raised density of crosslinking.
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