硅酮结构胶自然曝晒老化试样表征方法研究  

Characterization methods of silicone structural sealant after natural exposure aging test

作　　者：罗银 张宇旋 蒋金博 张冠琦 曾容 胡帅 何伟杰 Luo Yin;Zhang Yuxuan;Jiang Jinbo;Zhang Guanqi;Zeng Rong;Hu Shuai;He Weijie(Guangzhou Baiyun Chemical Industry Co.,Ltd.,Guangzhou 510540,Guangdong,China)

机构地区：[1]广州市白云化工实业有限公司,广东广州510540

出　　处：《中国胶粘剂》2022年第12期48-53,共6页China Adhesives

基　　金：国家重点研发计划项目(2017YFC0806100)。

摘　　要：对不同厂家的3种硅酮密封胶样品于广东、吐鲁番两地的曝晒场进行曝晒老化试验,对其外观、粘接性、拉伸强度和伸长率等性能进行分析。通过热重分析仪(TG)、傅里叶变换红外光谱仪(FT-IR)、扫描电子显微镜(SEM)等对各种曝晒试样进行测试,对试样老化前后微观内部结构变化进行分析。研究结果表明:老化后的试样A、B的力学性仍然能保持较好,试样C的力学性能下降明显。通过TG法、FT-IR法不能明显地表征出老化前后硅酮密封胶试样物理力学性能的差异变化,而通过SEM表征方法可发现样品老化前后的微观结构变化,所以研究表明后续硅酮结构胶老化的微观结构研究可采用SEM表征方法。Three kinds of silicone sealant samples from different manufacturers were tested in the exposure fields of Guangdong and Turpan,and their appearance,bonding properties,tensile strength and elongation were analyzed.Various exposure samples were tested by thermogravimetric analyzer(TG),Fourier transform infrared spectrometer(FT-IR)and scanning electron microscope(SEM),and the microscopic internal structural changes of samples before and after aging were analyzed.The research results showed that after aging,the mechanical properties of sample A and sample B could still be maintained well,while the mechanical properties of sample C decreased significantly.The difference changes of physical and mechanical properties of silicone sealant samples before and after aging could not be obviously characterized by TG method and FT-IR method,while the microstructural changes of samples before and after aging could be found by SEM characterization method.Therefore,the study indicated that SEM characterization method could be used for the subsequent study of aging microstructure of silicone structural adhesive.

关 键 词：硅酮结构胶 自然曝晒 老化 

分 类 号：TQ437[化学工程]