%0 Journal Article
%T 扩链剂对UV固化聚氨酯性能的影响
%A 邓剑如
%A 罗赛
%A 龙立
%A 刘苗娥
%J 湖南大学学报(自然科学版)
%D 2017
%X 以聚己二酸一缩二乙二醇酯 2000为软段，不同二元醇扩链剂和异佛尔酮二异氰酸酯(IPDI)为硬段，丙烯酸羟乙酯(HEA)封端，采用预聚体法合成UV固化聚氨酯.分析了不同二元醇扩链剂的相对动力学活性;通过红外光谱表征了光固化聚氨酯树脂的结构，研究了不同的二元醇扩链剂对光固化膜力学性能、耐热性能和使用性能的影响.结果表明，反应温度80 ℃，乙二醇(EG)与苯基异氰酸酯(PI)的反应速率最快，1,2 丙二醇(1,2 PEG)与PI的反应速率最慢;以1,4 环己烷二甲醇(CHDM)为扩链剂的聚氨酯膜力学性能和耐热性最好.</br>A series of UV curable polyurethanes that were compounded based on polydiethylene glycol 2000 as soft segments,different glycol chain extenders and isophorone diisocyanate (IPDI) as hard segments,and 2 Hydroxyethyl acrylate (HEA) as blocking agent were synthesized by prepolymer method. The relative activities of different glycol chain extenders as chain extenders were analyzed: the structure of UV curable polyurethane was characterized by infrared spectral,and the influences of different glycol chain extenders on the mechanical performance,heat resistance performance and usability of cured film were studied. The results show that under 80 ℃,the reaction speed of ethylene glycol and phenyl isocyanate(PI) is the fastest,the speed of 1,2 propylene diatomic alcohol and PI is the slowest,and 1,4 cyclohexane dimethanol(CHDM) as chain extender of PU has the best mechanical properties and heat resistance.
%K 紫外光固化聚氨酯 性能 动力学 扩链剂&lt
%K /br&gt
%K UV curable polyurethane performance kinetics chain extenders
%U http://hdxbzkb.cnjournals.net/ch/reader/view_abstract.aspx?file_no=20170617&flag=1