有机硅改性水性聚氨酯的合成及其光固化动力学的研究  

Synthesis and UV-curing kinetics of waterborne polyurethane acrylate modified by organic silicon

作　　者：刘伟[1] 洪鹏[1] 崔艳艳[1] 刘晓暄[1] 

机构地区：[1]广东工业大学材料与能源学院高分子材料与工程系,广州510006

出　　处：《功能材料》2015年第15期15064-15068,共5页Journal of Functional Materials

基　　金：省教育厅科技创新重点资助项目(CXZD1126)

摘　　要：将异佛尔酮二异氰酸酯(IPDI)加到端羟基聚二甲基硅氧烷(PDMS)和聚乙二醇(PEG600)混合物中进行反应,生成端基为异氰酸酯基的聚氨酯预聚体,用二羟甲基丙酸(DMPA)进行亲水扩链,季戊四醇三丙烯酸酯(PETA)引入光固化基团,然后用三乙胺中和,最后加水乳化,合成了一种有机硅改性水性聚氨酯乳液(WPUA-Si)。通过FT-IR、TG、吸水率测试对其进行了研究。结果表明,有机硅改性的水性聚氨酯树脂的耐水性和热稳定性均有所提高。采用实时(real time)红外光谱原位(in situ)跟踪监测了该树脂的光固化动力学行为,结果表明,当光引发剂Darocur1173含量为树脂质量的5%(质量分数),体系光固化速率为最优。此外,增大辐照光强也有利于树脂的光固化。The PUA prepolymer with isocyanate ending group has been prepared by the addition of isophorone diisocyanate( IPDI) with the mixture of polyethylene glycol( PEG600) and hydroxyl-ending polydimethylsiloxane( PDMS).And then using dimethlolpropionic acid( DMPA) as a hydrophilic,pentaerythritol triacrylate( PETA) as an UV-curing groups and triethylamine( TEA) as a neutralizer,the waterborne polyurethane modified with organosilicone( WPUA-Si)was eventually obtained through the emulsification. The structure and property of the WPUA-Si oligomer was characterized using infrared spectroscopy( FT-IR) and TG. The results show that water resistance and thermal stability of the UVcured film of the WPUA-Si oligomer was improved. The UV-curing kinetics of the WPUA-Si oligomer was also investigated by real time FT-IR. When the amount of photoinitiator Darocur1173 was 5wt%,UV-curing rate of the WPUA-Si oligomer was quickly and the conversion of the double bond was higher up to 90%. The light intensity of the radiation increasing can improve the UV-curing rate of the system.

关 键 词：有机硅氧烷 水性聚氨酯 光固化动力学 实时红外 

分 类 号：TQ322.4[化学工程—合成树脂塑料工业]