硅酮密封胶失效研究及其模型的建立  

Structural Silicone Sealant Aging Failure Analysis and the Practical Failure Model

作　　者：李倩[1] 夏美霞[1] 彭浩[1] 何潇俊[1] 

机构地区：[1]上海市质量监督检验技术研究院,上海201114

出　　处：《建筑节能》2016年第2期30-34,39,共6页BUILDING ENERGY EFFICIENCY

基　　金："十二五"国家科技支撑计划项目(2013BAK04B04-03):典型产品质量安全风险监控应用试点研究

摘　　要：为了分析硅酮结构密封胶的相容性和粘结性对玻璃幕墙安全性和使用寿命的影响,阐述了各种老化处理对硅酮结构密封胶失效的影响。通过有机硅聚合物总量(硅胶+硅油)来初步分析了热老化-热失重的原因,并通过人工加速老化模拟实际高温对硅酮结构胶失效的影响。结果表明,热老化-热失重对硅酮结构密封胶的拉伸强度和粘结破坏面积影响显著。有机硅聚合物总量(硅胶+硅油)决定了硅酮结构密封胶的质量和使用寿命。盐雾和建筑物清洁剂对高模量胶影响很大,但基本不影响低模量胶的形变能力。通过构建硅酮结构密封胶在工程中的实际应用情况试验模型,硅酮结构密封胶的衰减率随温度升高和高温处理时间增加而增加。In order to analyze the effect of structural silicone sealants＇ compatibility and adhesion to safety and service life of glass curtain, this paper described various measures for solving the aging of structural silicone sealant. Causes of thermal aging and thermal weightlessness are analyzed through total organic silicon polymer（silicone＋silicone oil）preliminarily; and the artificial acceleration is utilized for aging to simulate the actual effect of high temperature to failure of silicone sealant. The results showed that, the thermal aging and thermal weightlessness had significantly damage on the tensile strength and adhesive area of silicone sealant. The total amount of organic silicon polymer（silicone＋silicone oil）determined the quality and service life of structural silicone sealants. Salt spray＂ and cleaning agent for building had a great influence on high modulus sealant, but it had no effect on the deformation of low modulus sealant. The decay rate of structural silicone sealant increased with the temperature rising and heat treatment time changing, through establishing the madel for the practical application in engineering construction.

关 键 词：硅酮结构密封胶 老化失效 有机硅聚合物总量 模型 

分 类 号：TU578[建筑科学—建筑技术科学]