Abstract: The thermal-oxidative aging mechanism of epoxy adhesive was studied by infrared spectroscopy, X-ray photoelectron spectroscopy and scanning electron microscope. The mechanical property of epoxy adhesive joint was tested and the effect of thermal oxygen environment on its mechanical property decrease was analyzed. Experimental results showed the main chemical reactions of epoxy adhesive during accelerated thermal aging were post cure reaction and oxidation reaction. During thermal aging, the OH group of epoxy adhesive was oxidized to aldehyde group, methylene was oxidized to amide. The mechanical properties of epoxy adhesive after thermal aging showed good resistance to aging, the adhesive strength was relatively stable as aging time lasted.
1 王孟钟, 黄应昌. 胶粘剂应用手册[M]. 北京:化学工业出版社,2003:931. 2 张向宇. 胶粘剂分析与测试技术[M]. 北京:化学工业出版社,2004:350. 3 Armstrong K B. Long-term durability in water of aluminium alloy adhesive joint bonded with epoxy adhesive [J]. Int Adhesion Adhesives,1997,17(2):89. 4 Barral L, Cano J, Lopez J, et al. Physical aging of a tetrafunctional/phenol novolac epoxy mixture cured with diamine. DSC and DMA measurements [J]. J Thermal Anal Calorimetry,2000,60(2):391. 5 Hong Shinn-gwo. The thermal-oxidative degradation of an epoxy adhesive on metal substrates: XPS and RAIR analyses [J]. Polym Degrad Stab,1995,48:211. 6 Li Z, You M, Feng P. A review of research on the interface of bon-ded joints and its theories [J].Mater Rev,2006,20(10):48(in Chinese). 李智, 游敏, 丰平. 胶结接头界面理论及其表面处理技术研究进展[J]. 材料导报,2006,20(10):48. 7 Liu J J, Li X Y. Progress in study of polymer degradation behaviors and mechanisms in various environment conditions [J]. Polym Bull,2005(3):62(in Chinese). 刘景军, 李效玉. 高分子材料的环境行为与老化机理研究进展[J]. 高分子通报,2005(3):62. 8 Ni X X, Li X G, Zhang S P, et al. Heat-aging behavior of epoxy-polyamide adhesive [J]. Adhesion China,2009,30(4):31 (in Chinese). 倪晓雪, 李晓刚, 张三平, 等. 环氧-聚酰胺胶粘剂的热老化行为研究[J]. 粘接,2009,30(4):31. 9 Wen W, Zhang S P, Ni X X, et al. Research on weathering of epoxy resin adhesive in the subtropical humid city climate [J]. Equipment Environ Eng,2008,5(3):9(in Chinese). 文伟, 张三平, 倪晓雪, 等. 环氧胶在亚热带湿润性气候中的老化行为研究[J]. 装备环境工程,2008,5(3):9. 10 Musto P, Ragosta G, Russo P, et al. Thermal-oxidative degradation of epoxy and epoxy-bismaleimide networks: Kinetics and mechanism [J]. Macromol Chem Phys,2001,202:3445. 11 Chauffaille S, Devos O, Jumel J, et al. Liquid diffusion in polymeric adhesives by electrochemical-impedance spectroscopy(EIS) [J]. Int J Adhesion Adhesives,2010,30:602. 12 Buch X, Shanahan M E R.Influence of the gaseous environment on the thermal degradation of a structural epoxy adhesive [J]. J Appl Polym Sci,2000,76:987. 13 Doyle G, Pethrick R A. Environmental effects on the ageing of epoxy adhesive joints [J]. Int J Adhesion Adhesives,2009,29:77. 14 Li Z C, Joshi S, Hayward D, et al. High frequency electrical mea-surements of adhesive bonded structures-an investigation of model parallel plate waveguide structures [J]. NDT&E Int,1997,30(3):151. 15 Halliday S T, Banks W M, Pethrick R A. Dielectric studies of adhesively bonded CFRP/epoxy/CFRP structures -design for ageing [J]. Compos Sci Technol,2000,60:197. 16 Gao S C, Zhang K Z, Guo P J. XPS analysis on the steel/adhesive interface [J]. J Solid Rocket Technol,2004,27(2):154(in Chinese). 高守超, 张康助, 郭平军. 钢与胶粘剂粘接界面的XPS分析[J]. 固体火箭技术,2004,27(2):154.
渝公网安备50019002502923号 版权所有：《材料导报》编辑部
2017, Vol. 31 
