建筑装饰用改性聚硫密封胶的制备及粘接性能研究  

Preparation and adhesive properties of modified polysulfide sealant for building decoration

作　　者：李天刚 Li Tiangang(Jilin Engineering Vocational College,Siping 136001,Jilin,China)

机构地区：[1]吉林工程职业学院,吉林四平136001

出　　处：《中国胶粘剂》2020年第11期42-47,共6页China Adhesives

摘　　要：选取橡胶改性剂作为聚硫密封胶改性物质,根据固定配方制备改性聚硫密封胶。着重研究了改性聚硫密封胶的拉伸强度、断裂伸长率、剥离强度、表干时间、固化时间、弹性恢复率和粘接强度等性能指标。研究结果表明:当w(基胶)=40%(相对密封胶质量而言)、反应时间为2 h、重质碳酸钙作为填料时,改性聚硫密封胶的拉伸强度、断裂伸长率、剥离强度、粘接稳定性以及粘接强度较佳。此时改性聚硫密封胶拉伸粘接强度高达0.99 MPa,且改性后聚硫密封胶表干时间、固化时间、适用期、下垂度和弹性恢复率均优于未改性的聚硫密封胶。The rubber modifier was selected as the modified material of polysulfide sealant,and the modified polysulfide sealant was prepared according to the fixed formula.The tensile strength,elongation at break,peel strength,surface drying time,curing time,elastic recovery rate and bonding strength of modified polysulfide sealant were emphatically studied.The research results showed that the tensile strength,elongation at break,peel strength,bonding stability and bonding strength of modified polysulfide sealant were excellent when w(primer)=40%(relative to the mass of sealant),reaction time was 2 h,and heavy calcium carbonate was used as filler.At this time,the tensile bonding strength of modified polysulfide sealant was up to 0.99 MPa,and the surface drying time,curing time,pot life,slump and elastic recovery rate of modified polysulfide sealant were better than those of unmodified polysulfide sealant.

关 键 词：建筑装饰 改性 聚硫密封胶 制备 粘接性能 

分 类 号：TQ433[化学工程]