KINETIC PECULIARITIES OF RADICAL POLYMERI ZATION IN THIN-LAYERS OF PHOTOPOLYMERIZABLE COMPOSITIONS

Kinetic peculiarities of photoinitiated radical polymerization of some oligoester acrylates in the presence of copolymers of butyl- and meth yl methacrylates with methacrylic acid were studied. It was found that the hindering of molecular mobility in these systems, caused by the i ncreased content of copolymer in the polymerizing layers, initially lo wers the efficiency of the inhibitors of radical polymerization and th en decreases the rate of chain propagation. The changes in the kinetic parameters of polymerization occur at the mobilities of reactants cha racterized by rotational correlation times of a spin probe (2.2,6.6-te tramethyl-4-oxopiperidinooxy) in the range from 4 x 10(-10) to 8 x 10( -10) s.