反应型聚氨酯热熔胶的制备及其粘接性能的研究  

Synthesis and Bonding Properties of Reactive Hot Melt Polyurethane Adhesives

作　　者：唐启恒[1] 何吉宇[1] 艾青松[1] 杨荣杰[1] 

机构地区：[1]北京理工大学材料科学与工程学院,北京100081

出　　处：《材料工程》2013年第8期55-59,共5页Journal of Materials Engineering

摘　　要：以4,4′-二苯基甲烷二异氰酸酯、采四氢呋喃醚二元醇和1,4-丁二醇为基本原料,采用两步本体聚合方法制备了一种耐热性能好、粘接强度高的反应型聚氨酯热熔胶黏合剂(RHMPA)。通过拉伸剪切强度和对接粘接强度来研究不同扩链温度和时间对RHMPA粘接性能的影响。结果表明:热熔胶粘接强度不仅随着扩链反应时间的延长而变大,还随着温度的升高而升高,并且,反应温度越高,对接粘接强度增大的幅度越明显。同时,还研究了热熔胶在盐酸溶液、NaOH水溶液、80℃的热水以及-20℃的低温下处理10h后粘接性能的变化,研究表明,这种热熔胶粘接性能没有发生明显的变化,表现出良好的耐化学性能。One kind of heat resistant and high bonding strength of reactive hot melt polyurethane adhe- sive （RHMPA） was successfully synthesized using a two-step bulk polymerization with 4,41-diphenly- methane diisocyanate （MDI）, poly（tetramethylene glycol） （PTMG）, and 1,4-butanediol （1,4-BDO）. The effect of RHMPA chain extended at different time and temperatures on adhesive performance was studied by single lap shear strength and tensile strength of butt joints. The results showed that the bonding strength increased with the chain extending reaction time and temperature. Moreover, the higher the reaction temperature, the increasing trend of butt bond strength was more obvious. In addi- tion,the influence on adhesive performance of the RHMPA dealed with hydrochloric acid solution, NaON aqueous solution,hot water at 80＂C ,high and low temperature were also investigated. The re- sults showed that the bonding strength of the RHMPA almost unchanged and exhibited an excellent chemical resistance to these conditions.

关 键 词：聚氨酯 反应型热熔胶 扩链反应动力学 粘接强度 

分 类 号：TQ436.4[化学工程]