高固含量UV固化水性PUA的制备及性能  

Preparation and Properties of High Solid Content UV-curing Waterborne Polyurethane Acrylate

作　　者：李菁熠[1,2] 李小瑞 朱科[2] 沈一丁 王海花[1] LI Jing-yi;LI Xiao-rui;ZHU Ke;SHEN Yi-ding;WANG Hai-hua(Key Laboratory of Auxiliary Chemistry ＆ Technology for Chemical Industry,Ministry of Education,Shaanxi University of Science ＆ Technology,Xi＇an 710021,Shaanxi,China;College of Chemistry and Material,Weinan Normal University,Weinan 714099,Shaanxi,China)

机构地区：[1]陕西科技大学化学化工学院,教育部轻化工助剂化学与技术重点实验室,陕西西安710021 [2]渭南师范学院化学与材料学院,陕西渭南714099

出　　处：《精细化工》2018年第9期1615-1620,共6页Fine Chemicals

基　　金：国家自然科学基金(21505089,21544011);陕西省教育厅科研计划项目(17JK0270)~~

摘　　要：以聚乙二醇600双丙烯酸酯（PEG600DA）作为可聚合非离子乳化剂，制得了高固含量（树脂占乳液质量的54％）紫外光固化水性聚氨酯丙烯酸酯乳液（PWPUA）。通过FTIR对聚合物结构进行了表征，采用DLS、TSI、TGA、DSC和万能试验机考察了PEG600DA质量分数对乳液粒径分布、乳液稳定性、胶膜热性能及力学性能的影响。结果表明：随PEG600DA质量分数的增加，乳液粒径及稳定性先降低后增大；同时乳胶膜的软段玻璃化转变温度（Tgs）上升，硬段玻璃化转变温度（强）下降。当w（PEG600DA）=6．09％时，乳液粒径为31．86nm且粒径分布为单峰；TSI值最小，稳定性最佳；乳胶膜拉伸强度最大为27．82MPa。当w（PEG600DA）=8．87％时，乳胶膜最高降解温度最大（Tmax=396．483℃），热稳定性最佳。A series of high solid content （54%） UV-curable waterborne polyurethane-polyacrylate emulsion （PWPUA） were synthesized by using polyethylene glycol 600 diacrylate （PEG600DA） as polymerizable nonionic emulsifier. The structure of polymer was characterized by FTIR. The effects of mass fraction of PEG600DA on the particle size distribution and stability of PWPUA emulsion, and the thermal properties and mechanical properties of emulsion films were characterized by DLS, TSI, TGA, DSC and universal testing machine. The results showed that with the increase of the mass fraction of PEG600DA, the particle size and stability of emulsion initially decreased and then increased. At the same time, the soft segment glass transition temperature （Tgs） of film increased, and hard segment glass transition temperature （Tgh） decreased. When the mass fraction of PEG600DA was 6.09%, the particle size of the obtained emulsion was 31.86 nm, its particle size distribution exhibited a single peak. The emulsion had the best stability, and the corresponding film showed the largest tensile strength of 27.82 MPa. However, the emulsion film containing 8.87% mass fraction of PEG600DA presented the optimal thermal stability and the highest degradation temperature （Tmax=396.483 ℃）.

关 键 词：UV固化 聚氨酯丙烯酸酯 聚乙二醇600双丙烯酸酯 示差扫描量热法 力学性能 丙烯酸系列化学品 

分 类 号：TQ63[化学工程—精细化工]