偶联剂对聚硫密封剂性能的影响

摘要

通过在聚硫密封剂体系中引入偶联剂，研究了其种类对密封剂与各种界面老化前后的黏结效果，同时考察了偶联剂对聚硫密封剂耐介质、工艺性能及贮存稳定性的影响。结果表明：单一的偶联剂并不能满足密封剂对多种界面都达到可靠稳定黏结的要求。使用550与401共混偶联剂，聚硫密封剂的综合性能较好。%Coupling reagent was introduced in polysulfide sealant system in this paper. The effect of the type of coupling reagent on the adhesion to various of surfaces before and after aging was studied. Meanwhile, the influence of coupling reagent on the medium resistance, processing performance and storage stability of polysulfide sealant was explorated. The results showed that the single coupling agent could not meet the reliable requirements for the sealants adhesion to various of surfaces. The comprehensive performance of polysulfide sealant was optimized by the use of blending coupling agent 550 and 401.