装配式建筑玻璃幕墙接缝用密封胶性能测试  

Performance Test of Sealant for Joints of Fabricated Glass Curtain Walls

作　　者：包海利 BAO Hai-li(China Railway Construction Real Estate Group(East China)Co.,Ltd.,Hangzhou 310011,China)

机构地区：[1]中铁房地产集团华东有限公司,浙江杭州310011

出　　处：《液压气动与密封》2023年第7期92-97,共6页Hydraulics Pneumatics & Seals

基　　金：浙江省分析测试基金(01174)。

摘　　要：以端硅烷改性聚醚、纳米碳酸钙、增塑剂以及触变剂等为材料,制备装配式建筑玻璃幕墙接缝用密封胶,并测试不同种配料方式以及环境因素,对密封胶性能的影响。结果表明:选取DEDB类型密封胶配料中增塑剂、将纳米碳酸钙作为填料、将聚酰胺蜡作为触变剂时,密封胶的拉伸强度、断裂伸长率以及抗流性等性能最佳;在氧化锌晶须含量为0.6%时,密封胶硬度最高,拉伸宽度以及可承受最大拉力最大,且氧化锌晶须在密封胶中分散均匀,可产生网状骨架结构,能够提高密封胶的力学性能;密封胶在水湿和紫外线照射的环境中会加快密封胶的老化,浸水及照射时间越长密封胶老化速度越快;加入一定比例的三甲氧基硅烷,可延长密封胶存储时的表干时间,提升其储存稳定性。Using silane terminated polyether,nano calcium carbonate,plasticizer and thixotropic agent as materials,the sealant for joints of fabricated building glass curtain wall was prepared,and the effects of different ingredients and environmental factors on the sealant performance were tested.The results showed that the tensile strength,elongation at break and flow resistance of the sealant were the best when the plasticizer in DEDB type sealant ingredient,nano calcium carbonate as filler and polyamide wax as thixotropic agent were selected;When the content of zinc oxide whiskers is 0.6%,the hardness of sealant is the highest,the tensile width and the maximum tensile force that can be withstood are the largest,and zinc oxide whiskers are evenly dispersed in the sealant,which can produce a network framework structure and improve the mechanical properties of sealant;The aging of sealant will be accelerated when the sealant is exposed to water and ultraviolet radiation.The longer the immersion and radiation time is,the faster the aging of sealant will be;Adding a certain proportion of trimethoxysilane can prolong the surface drying time of sealant during storage and improve its storage stability.

关 键 词：装配式建筑 密封胶 邵氏硬度 拉伸黏贴强度 断裂伸长率 弹性恢复率 

分 类 号：TB42[一般工业技术] TQ436.6[化学工程]