Abstract
A novel alkali-soluble hyperbranched photosensitive polysiloxane urethane acrylate (AHBPSUA) was synthesized by using hyperbranched polyesters, hydroxyl-terminated polysiloxane, dimethylolpropionic acid, isophorone diisocyanate, and 2-hydroxyethyl acrylate as raw materials, and its structure was characterized by Fourier transform infrared spectroscopy, gel permeation chromatography, and 1H nuclear magnetic resonance spectroscopy. It was found that AHBPSUA possessed good compatibility with a number of acrylate monomers. The effect of photoinitiators and monomers on the photopolymerization kinetics of AHBPSUA was investigated by real-time infrared spectroscopy (RT-IR). The results showed that AHBPSUA could rapidly photopolymerize under UV irradiation in the presence of a photoinitiator and the optimal concentration of the photoinitiator (Darocur 1173) was determined as 0.1 wt %. The resin of AHBPSUA with common acrylic monomers exhibited a high polymerization rate and double-bond conversion and could form a...
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