耐候试验对中空玻璃密封胶红外光谱的影响  

Influence of weathering test on infrared spectrum of insulating glass sealants

作　　者：王龙梅[1] 姚永新 周磊 黄昕航 Wang Longmei;Yao Yongxin;Zhou Lei;Huang Xinhang(Shanghai Institute of Quality Inspection and Technical Research,Shanghai 201114,China)

机构地区：[1]上海市质量监督检验技术研究院,上海201114

出　　处：《中国胶粘剂》2023年第5期53-58,共6页China Adhesives

基　　金：上海市市场监督管理局项目《中空玻璃密封胶红外光谱数据库建立及老化应用研究》(2021-32)。

摘　　要：采用高湿、高低温、气候和紫外辐照4种条件进行中空玻璃密封胶耐候试验。采用衰减全反射(ATR)法测试耐候试验前后密封胶的红外光谱,分析不同试验条件对中空玻璃硅酮胶、聚硫胶和聚氨酯胶红外光谱的影响。研究结果表明:4种条件耐候试验后,中空玻璃密封胶的红外光谱吸收峰位置均没有明显变化;高湿试验后,红外吸收峰强度降低,其中硅酮胶降低最明显;高低温试验后,红外光谱基本没有变化;气候试验和紫外辐照试验后,硅酮胶的红外光谱没有变化,聚硫胶主要吸收峰强度明显降低,聚氨酯胶除1 407 cm^(-1)附近吸收峰强度降低外,其他吸收峰强度均有所增强。耐候试验后密封胶的红外光谱变化表明,3种密封胶耐高低温性能均优异,耐湿性能硅酮胶最差、聚氨酯胶最好,耐紫外辐照性能硅酮胶最好、聚硫胶最差。The weathering test of insulating glass sealants was carried out under four conditions of high humidity,high and low temperature,climate and ultraviolet radiation.The attenuated total reflection(ATR)method was used to test the infrared spectrum of sealants before and after weathering test,the effects of different test conditions on the infrared spectrum of silicone sealant,polysulfide sealant and polyurethane sealant for insulating glass were analyzed.The research results showed that the position of infrared spectrum absorption peak of insulating glass sealants had no obvious change after four kinds of weathering test.After the high humidity test,the intensity of infrared absorption peak decreased,with silicone sealant showing the most significant decrease.After the high and low temperature test,the infrared spectrum remained basically unchanged.After the climate test and ultraviolet irradiation test,the infrared spectrum of silicone sealant did not change,the intensity of the main absorption peaks of polysulfide sealant decreased significantly,and the intensity of other absorption peaks of polyurethane sealant increased except for the decrease of intensity of the absorption peak near 1407 cm^(-1).The change of infrared spectrum of sealants after weathering test showed that three sealants had excellent high and low temperature resistance,among which silicone sealant had the worst moisture resistance and polyurethane sealant had the best,meanwhile silicone sealant had the best UV radiation resistance and polysulfide sealant had the worst.

关 键 词：耐候试验 硅酮胶 聚硫胶 聚氨酯胶 红外光谱 

分 类 号：TQ436.6[化学工程]