环氧聚丁二烯丙烯酸酯的合成及其紫外光固化收缩率的研究

Study on the Synthesis of Epoxy Polybutadiene Acrylate and UV Curing Shrinkage

针对紫外光固化胶黏剂固化收缩率较大的问题,合成了一种具有双重固化机理的预聚物——环氧聚丁二烯丙烯酸酯.通过控制变量,得到制备该预聚物的较为理想的合成条件.利用FT-IR,1H-NMR对预聚物进行了表征,并测定了使用该预聚物的紫外光固化体系的固化收缩率.研究结果表明：在预聚物合成中,反应时间7h,丙烯酸质量分数在5%~20%时为宜;预聚物的环氧值为3.430%时固化效果较好;三苯基膦是较为理想的催化剂;预聚物、乙氧基乙氧基乙基丙烯酸酯（EOEOEA）和正丁基缩水甘油醚（BGE）质量比为60∶10∶25时,固化收缩率可达2.59%.

In view of the large curing shrinkage of UV-curing system,a type of prepolymer that has dual curing mechanism,epoxy polybutadiene acrylate,was synthesized.An ideal synthesis condition was achieved by controlling variables.The prepolymer was characterized by FT-IR and 1H-NMR,and the curing shrinkage of this UV-curing system was also studied.The results showed that in the synthesis of prepolymer reaction time was about 7hand the dosage of acrylic acid was 5%-20%（by mass）.When the exopy value of the prepolymer was 3.430%,the curing result was better.Triphenylphosphine was an ideal catalyst.In the UV curing when the mass ratio of prepolymer,2-（2-ethoxyethoxy）ethyl acrylate（EOEOEA）,and butyl glycidyl ether（BGE）,was 60∶10∶25,the curing shrinkage came to 2.59%.