Synthesis and Characterization of Alkali-Soluble Hyperbranched Photosensitive Polysiloxane Urethane Acrylate
详细信息 查看全文
- 作者：Fang Sun ; Xiaokang Liu ; Lu Zhang ; Hongguang Du
- 刊名：Industrial & Engineering Chemistry Research
- 出版年：2012
- 出版时间：January 11, 2012
- 年：2012
- 卷：51
- 期：1
- 页码：240-247
- 全文大小：929K
- 年卷期：v.51,no.1(January 11, 2012)
- ISSN：1520-5045
文摘
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 regular image under UV irradiation through a patterned mask. The AHBPSUA system could dissolve in 1 wt % sodium carbonate solution easily and completely, and the cured coating film of the AHBPSUA system possessed excellent flexibility, toughness, and heat resistance.