水溶性超支化光敏有机硅聚氨酯丙烯酸酯光固化膜的性能研究

Study on properties of UV-curable films based on water-soluble hyperbranched photosensitive polysiloxane urethane acrylate oligomer

合成了3种水溶性超支化光敏有机硅聚氨酯丙烯酸酯(WHBPSUA),详细研究了体系组成对其光固化膜的吸水率、硬度、体积收缩率、拉伸强度、拉伸率、耐热性能以及附着力的影响。研究发现:体系的吸水率随着低聚物支化度和体系交联度增加而下降,随低聚物含量的增加而增加;体积收缩率随着低聚物的含量以及单体官能度的增大而升高,且所研究体系的体积收缩率均<7%;加入高支化度的低聚物和多官能度的单体有助于提高固化膜的拉伸强度;固化膜的耐热性随着单体官能度的增大而增强;所研究体系在无机玻璃上有优异的附着力。

The effect of system composition of the water-soluble hyperbranched photosensitive polysiloxane urethane acrylate （WHBPSUA） with three degrees of branching on physical and mechanical properties of WHBPSUA curable films including water resistance, volume shrinkage, hardness, adhesion, tensile strength, elongation and heat resistance, was investigated in this paper. The results showed that the water absorption of the WHBPSUA decreased with increasing the degree of branching of the oligomer, the content of monomer and erosslinking yield. The volume shrinkage of the WHBPSUA systems increased with increment of WHBPSUA concentration and monomer function- ality, while the volume shrinkage of investigated WHBPSUA was lower than 7%. The oligomer with a high degree of branching and multi-functional monomer could improve hardness and tensile strength of the WHBPSUA. When func- tionality of reactive monomer increased, the heat resistance of the WHBPSUA could be enhanced. The WHBPSUA possesses excellent adhesion on the inorganic glass.