Abstract
It is clearly demonstrated that amine-functionalized methacrylates are quite effective in accelerating the photopolymerization of air-saturated 1,6-hexanediol diacrylate (HDODA). For each amine investigated, the extent of rate enhancement is dependent both on the type and degree of alkyl substitution as well as the amine concentration. Dimethyl substituted amines are more effective than diethyl substituted amines in sustaining the rapid oxygen-scavenging process responsible for the polymerization rate increase. At higher amine concentrations, an inhibition process dominates the polymerization and the oxygen-scavenging process is rendered relatively ineffective. The general effect of the functionalized methacrylates is confirmed by investigation of alkyl substituted diaminoethylene compounds.
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