Abstract
A low viscosity urethane diacrylate monomer of 2-(acryloyloxy) ethyl bis (2-(acryloyloxy) ethyl)carbamate (AEBAC) was prepared via a nonisocyanate route. The photopolymerization kinetics of this urethane acrylate was studied by real-time FTIR. The influences of light intensity, photoinitiator type, and concentration on the polymerization kinetics were discussed. The photopolymerization kinetic results indicated that the relationship between the polymerization rate (Rp) and the incident light intensity (I0) was Rp∞I00.5 and the maximum rate of polymerization (Rp,max) was proportional to [A]0.5 ([A] was the molar concentration of initiator). The dynamic mechanical analysis (DMA) results indicated that the glass transition temperature (Tg) of the curing product of AEBAC was about 80°C.
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