含刚性环结构的光固化水性有机硅聚氨酯丙烯酸酯的性能研究

将丙烯酸异冰片酯（IBOA）和二乙醇胺（DEA）反应，合成了一种新颖的带有刚性环结构的单体3-（N，N-二羟乙基氨基）丙酸异冰片酯（DEAIBOA），然后将DEAIBOA引入水性有机硅聚氨酯丙烯酸酯分子中，合成了一系列具有不同刚性环含量的有机硅聚氨酯丙烯酸酯水性低聚物（IBOA-WSPUA）。系统研究了低聚物中刚性环含量对乳液稳定性、光聚合性能及其固化膜的物理力学性能、玻璃化转变温度和附着力的影响，结果表明：所合成的5种低聚物的分子量均接近单分散，粒径分布均匀，具有良好的乳液稳定性及光聚合性能，双键的最终转化率均在85%以上；随刚性环含量的增加，低聚物固化膜的拉伸强度、玻璃化转变温度和铅笔硬度逐渐增大；低聚物固化膜的附着力得到明显改善，在聚碳酸酯（PC）、丙烯腈-丁二烯-苯乙烯共聚物（ABS）及玻璃基材上均达到5B。

Photocurable water-borne organosilicon polyurethane acrylates containing rigid rings

A novel monomer with a rigid ring structure, 3-(N, N-dihydroxyethylamino)propionic acid isobornyl ester (DEAIBOA), has been synthesized using isobornyl acrylate (IBOA) and diethanolamine (DEA). The resulting DEAIBOA was introduced into a water-borne organosilicon polyurethane acrylate prepolymer to afford a series of photocurable water-borne organosilicon polyurethane acrylates containing different rigid ring content (IBOA-WSPUA). The effects of varying the rigid ring content in the prepolymer on its emulsion stability, photopolymerization, and physical and mechanical properties, as well as the adhesion of the cured films were systematically investigated. The results show that the molecular weights of the five prepolymers were monodisperse. Their emulsions had uniform particle size distribution, excellent stability and good photopolymerization properties, and the final double bond conversion was above 85%. As the content of the rigid ring increased, the tensile strength, glass transition temperature and pencil hardness of the cured film gradually were enhanced, and the adhesion-which reached 5B for PC, ABS and glass substrates, improved significantly.