Abstract
Nine different kinds of polyether acrylic isocyanate oligomers were synthesized. The effect of their structures and molecular weight on radiation curing rate, curing dose and final gel content was investigated. The following results were obtained. 1. The concept of critical curing dose was defined. 2. The curing rate and final gel content of the acrylic oligomers of same morphology increases with the decreases of its molecular weight, while the critical curing dose increases with it. 3. An formula of radiation curing rate related with gel content and unsaturation has been found by kinetic analysis. R c= dg dt = K iK p K t M(1−g)(1+g)D were R c is the curing rate, g is gel content, M is unsaturation, and K i, K p, K t are rate constants for initiation, propagation and termination. D is dose rate.
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