MAP-POSS/不饱和环氧树脂混杂光固化膜制备与性能

由KH-570水解缩合制备甲基丙烯酰氧基丙基笼型倍半硅氧烷(MAP-POSS),并将其与不饱和环氧树脂组成自由基-阳离子混杂光固化体系。用红外光谱(FT-IR)表征固化过程特征吸收峰的变化;测试MAP-POSS含量对固化膜表面水接触角、硅元素分布以及涂膜力学性能、热性能的影响。结果表明:MAP-POSS的加入增加了体系的交联度,提高了涂膜的疏水性、热稳定性和玻璃化温度(Tg)。当MAP-POSS含量为12%(质量分数,下同)时,Tg增加了16.9℃。当MAP-POSS含量为15%时,涂膜对水的接触角由58.0°增大到94.2°。MAP-POSS的加入使涂膜的冲击强度先增加后减小。

Preparation and Properties of MAP-POSS/Unsaturated Epoxy Resin Hybrid Ultraviolet Light Cured Film

The methyl acryloyloxy propyl silsesquioxane(MAP-POSS) was prepared by hydrolysis condensation of KH-570,and composing free radical-cationic hybrid UV curing system with the unsaturated epoxy resin.The changes of characteristic absorption peak in the curing process was characterized by using infrared spectroscopy (FT-IR),and the influence of MAP-POSS content on the surface water contact angle,silicon elements distribution,mechanical properties and thermal performance of UV-cured film was investigated.The results show that with the addition of MAP-POSS the crosslinking degree,hydrophobicity,thermal stability and glass transition temperature(Tg) of the film are improved.When the content of MAP-POSS is 12％ (mass fraction,the same below),Tg is increased by 16.9℃.When the MAP-POSS content is 15％,the water contact angle of film is increased from 58.0° to 94.2°.The impact strength is improved firstly and then decreased with the addition of MAP-POSS.