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- 2016
T700碳纤维增强环氧树脂基复合材料自然老化性能与机制
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Abstract:
为验证复合材料的耐久性，对T700碳纤维增强环氧树脂基复合材料经自然老化后的微观形貌、表面元素含量、热性能与力学性能等进行了研究。结果表明： 在光氧老化与热氧老化的共同作用下，T700碳纤维增强EP-A环氧树脂基（T700/EP-A）复合材料表层树脂将发生老化降解，并且随自然老化时间的延长，T700/EP-A复合材料的玻璃化转变温度逐渐降低，未老化试样的玻璃化转变温度为207℃，经过自然老化处理3年后，其玻璃化转变温度降低为180℃，延长自然老化时间至5年时，其玻璃化转变温度进一步降低至172℃。而自然老化过程对复合材料力学性能可能同时存在着增强效应与损伤效应，因此造成了T700/EP-A与T700/EP-B复合材料的不同力学性能表现出相异的变化趋势。随自然老化时间延长，T700/EP-A与T700/EP-B复合材料纵向拉伸强度表现出先升高后降低的趋势，纵向弯曲强度表现出逐渐升高的趋势，纵向压缩强度与层间剪切强度存在波动，未呈现出明显变化。 In order to verify the durability of composites, the microscopic morphology, surface element content, thermal properties and mechanical properties of T700 carbon fiber reinforced epoxy resin matrix composites were studied after environmental aging. The results show that the coaction of photo-oxidative degradation and thermo-oxidative degradation cause the T700 carbon fiber reinforced EP-A epoxy resin matrix (T700/EP-A) composites surface resin aging degradation. With the extension of environmental aging time, the glass transition temperature of T700/EP-A composites decreases gradually. After 3 years of environmental aging treatment, glass transition temperature of T700/EP-A composites decreases from 207℃(un-aged specimen) to 180℃, and to 172℃ after extending environmental aging of 5 years. Enhancing effects and damaging effects of the environmental aging process may coexist in the mechanical properties of the composites, thus resulting in different mechanical properties of T700/EP-A and T700/EP-B composites showing disparate trends. With the extension of environmental aging time, the longitudinal tensile strength of T700/EP-A and T700/EP-B composites first increases then decreases, the longitudinal flexural strength gradually increases, fluctuant longitudinal compress strength and interlaminar shear strength show no significant variation tendency. 国家自然科学基金（51203144）
| [1] | CANDIDO G M, COSTA M L, REZENDE M C, et al. Hygrothermal effects on quasi-isotropic carbon epoxy laminates with machined and molded edges[J]. Composites Part B:Engineering, 2008, 39(3):490-496. |
| [2] | 冯青, 李敏, 顾轶卓, 等. 不同湿热条件下碳纤维/环氧复合材料湿热性能实验研究[J]. 复合材料学报, 2010, 27(6):16-20. FENG Q, LI M, GU Y Z, et al. Experimental research on hygrothermal properties of carbon fiber/epoxy resin composite under different hygrothermal conditions[J]. Acta Materiae Compositae Sinica, 2010, 27(6):16-20(in Chinese). |
| [3] | 詹茂盛, 刘德顺. 玻纤增强环氧树脂复合材料的酸雨循环老化性能与机理[J]. 玻璃钢/复合材料, 2007(3):28-32. ZHAN M S, LIU D S. Acid rain cycling aging properties and mechanism of unidirectional glass fiber reinforced epoxy composites[J]. Fiber Reinforced Plastics/Composites, 2007(3):28-32(in Chinese). |
| [4] | BURTON B L. The thermooxidative stability of cured epoxy resin. I[J]. Journal of Applied Polymer Science, 1993(47):1821-1837. |
| [5] | 黄力刚, 杨志忠, 阎宏, 等. 复合材料耐碱性能的研究[J]. 纤维复合材料, 2008(1):45-48. HUANG L G, YANG Z Z, YAN H, et al. Study on alkali resistance of composites[J]. Fiber Composites, 2008(1):45-48(in Chinese). |
| [6] | SHOKRIEH M M, BAYAT A. Effects of ultraviolet radiation on mechanical properties of glass/polyester composites[J]. Journal of Composite Materials, 2007, 41(20):2443-2455. |
| [7] | 许燕杰, 肇研, 汤冰洁, 等. UVA紫外辐射对室内碳纤维增强环氧树脂基复合材料性能的影响[J]. 复合材料学报, 2013, 30(2):63-69. XU Y J, ZHAO Y, TANG B J, et al. Effects of UVA irradiation on properties of carbon fiber reinforced epoxy resin composites indoor[J]. Acta Materiae Compositae Sinica, 2013, 30(2):63-69(in Chinese). |
| [8] | COGGESHALL R L. Boeing/NASA composite components flight service evaluation:181898[R]. Washington, D. C.:NASA, 1989. |
| [9] | 叶宏军, 詹美珍, 古尼耶夫G M, 等. T300/4211复合材料的使用寿命评估[J]. 材料工程, 1995(10):3-5. YE H J, ZHAN M Z, GUNYAEV G M, et al. In-service durability prediction of T300/4211 composites[J]. Journal of Materials Engineering, 1995(10):3-5(in Chinese). |
| [10] | 朱丽萍, 龚沛, 鲁闯, 等. 镁合金在万宁标准试验场的大气腐蚀行为[J]. 腐蚀与防护, 2014, 35(9):912-916. ZHU L P, GONG P, LU C, et al. Atmospheric corrosion behavior of magnesium alloys in wanning standard test site[J]. Corrosion & Protection, 2014, 35(9):912-916(in Chinese). |
| [11] | American Society for Testing and Materials International. Standard test method for tensile properties of polymer matrix composite materials:ASTM D 3039/D 3039M-14[S]. West Conshohocken:ASTM International, 2014. |
| [12] | American Society for Testing and Materials International. Standard test method for compressive properties of polymer matrix composite materials using a combined loading compression (CLC) text fixture:ASTM D 6641/D 6641M-09[S]. West Conshohocken:ASTM International, 2009. |
| [13] | American Society for Testing and Materials International. Standard test method for flexural properties of polymer matrix composite materials:ASTM D 7264/D 7264M-07[S]. West Conshohocken:ASTM International, 2007. |
| [14] | American Society for Testing and Materials International. Standard test method for short-beam strength of polymer matrix composite materials and their laminates:ASTM D 2344/D 2344M-06[S]. West Conshohocken:ASTM International, 2006. |
| [15] | 李东风, 王浩静, 贺福, 等. T300和T700炭纤维的结构与性能[J]. 新型炭材料, 2007, 22(1):59-64. LI D F, WANG H J, HE F, et al. Structure and properties of T300 and T700 carbon fibers[J]. New Carbon Materials, 2007, 22(1):59-64(in Chinese). |
| [16] | BELLENGER V, VERDU J. Photooxidation of amine crosslinked epoxies I. The DGEBA-DDM system[J]. Journal of Applied Polymer Science, 1983(28):2599-2609. |
| [17] | 陈祥宝. 先进树脂基复合材料的发展[J]. 航空材料学报, 2000, 20(1):46-54. CHEN X B. Development of advanced polymer composites[J]. Journal of Aeronautical Materials, 2000, 20(1):46-54(in Chinese). |
| [18] | 陈跃良, 刘旭. 聚合物基复合材料老化性能研究进展[J]. 装备环境工程, 2010, 7(4):49-56. CHEN Y L, LIU X. Progress of aging performance research of polymer matrix composites[J]. Equipment Environmental Engineering, 2010, 7(4):49-56(in Chinese). |
| [19] | 吕小军, 张琦, 马兆庆, 等. 湿热老化对碳纤维/环氧树脂基复合材料力学性能影响研究[J]. 材料工程, 2005(11):50-53. LYU X J, ZHANG Q, MA Z Q, et al. Study of hydrothermal aging effect on mechanical properties of carbon fiber/epoxy resin composites[J]. Journal of Materials Engineering, 2005(11):50-53(in Chinese). |
| [20] | 过梅丽, 肇研, 许凤和, 等. 先进聚合物基复合材料的老化研究——I. 热氧老化[J]. 航空学报, 2000, 21(增刊):62-65. GUO M L, ZHAO Y, XU F H, et al. Study of aging of advanced polymer matrix composites I. Thermooxidizing aging[J]. Acta Aeronautica et Astronautica Sinica, 2000, 21(Suppl.):62-65(in Chinese). |
