Synthesis and photopolymerization of 2-(acryloyloxy) ethyl bis (2-(acryloyloxy) ethyl)carbamate

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 (R_p) and the incident light intensity (I₀) was R_p∝I₀^0.5 and the maximum rate of polymerization (R_p,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 (T_g) of the curing product of AEBAC was about 80°C.

Keywords

kinetics / photopolymerization / RTIR / urethane diacrylate

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