碳纤维/聚三唑树脂复合材料的湿热老化行为

复合材料科学与工程 ›› 2014, Vol. 0 ›› Issue (11): 36-41.

碳纤维/聚三唑树脂复合材料的湿热老化行为

李玉玲, 万里强, 黄发荣^*, 杜磊

华东理工大学材料科学与工程学院,特种功能高分子材料及相关技术教育部重点实验室,上海 200237

收稿日期:2014-03-21 出版日期:2014-11-28 发布日期:2021-09-13
通讯作者: 黄发荣,男,博士,教授,fhuanglab@ecust.edu.cn。
作者简介:李玉玲,女,硕士研究生,主要从事聚三唑树脂及其复合材料研究。
基金资助:
上海市重点学科资助(B502)

THE HYGROTHERMAL AGING BEHAVIOUR OF CARBON FIBER REINFORCED POLYTRIAZOLE RESIN COMPOSITES

LI Yu-ling, WAN Li-qiang, HUANG Fa-rong^*, DU Lei

Key Laboratory of Specially Functional Polymeric Materials and Related Technology of Ministry of Education,School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China

Received:2014-03-21 Online:2014-11-28 Published:2021-09-13

摘要/Abstract

摘要： 本文研究了碳纤维/聚三唑树脂复合材料(T700/PTA)在80℃、相对湿度98%条件下的湿热老化行为。分别采用静态力学性能测试、吸湿称重、动态热机械分析、扫描电子显微镜观察等手段考察了复合材料在湿热条件下的力学性能变化、吸湿特性和形貌变化;利用半经验数学模型对复合材料进行强度拟合和寿命预测。结果表明,复合材料的弯曲强度、层间剪切强度受湿热影响显著,尤其在老化初期;复合材料吸湿第一阶段符合Fick扩散定律,扩散系数D=1.129×10^-6mm²/s;吸湿后试样的动态热机械分析谱图上出现两个转变,干燥后次级转变消失;湿热老化后,纤维与树脂基体之间的界面作用减弱;利用数学模型预测复合材料弯曲强度保留率为50%时的老化寿命为33600h,T700/PTA复合材料具有优良的耐湿热老化性能。

关键词: 碳纤维, 聚三唑基复合材料, 湿热老化, 强度模拟, 寿命预测

Abstract: The hygrothermal aging properties of the carbon fiber reinforced polytriazole resin composites (T700/PTA) were studied under the condition of 80℃ and 98% (relative humidity). Mechanical properties, moisture absorption characteristics and morphology changes of the composites were investigated by the weighing method, static and dynamic mechanical test as well as the SEM observation. The strength of composites can be fitted by semiempirical mathematical model, which was used to predicte the service lifetime of composites. The results show that the flexural strength and ILSS of composites are significantly affected by the hygrothermal environment, especially in the early aging period. Absorption characteristics of the composites obey Fick's second law in the first aging stage (diffusion coefficient D=1.129×10^-6mm²/s). Two transitions are found on the dynamic mechanical thermographs of the aging composites, while the secondary transition at lower temperature disappears after drying. The interaction at the fiber/resin interface weakens after aging. It is predicted that the lifetime of composites is 33600h when the strength retention remains 50%. The T700/PTA composites have excellent resistance to hygrothermal environment.

Key words: carbon fiber, polytriazole resin composites, hygrothermal aging, strength simulation, lifetime prediction

中图分类号:

TB332

李玉玲, 万里强, 黄发荣, 杜磊. 碳纤维/聚三唑树脂复合材料的湿热老化行为[J]. 复合材料科学与工程, 2014, 0(11): 36-41.

LI Yu-ling, WAN Li-qiang, HUANG Fa-rong, DU Lei. THE HYGROTHERMAL AGING BEHAVIOUR OF CARBON FIBER REINFORCED POLYTRIAZOLE RESIN COMPOSITES[J]. COMPOSITES SCIENCE AND ENGINEERING, 2014, 0(11): 36-41.

参考文献

[1] Wan L Q, Tian J J, Huang J Z, Hu Y H, Huang F R, Du L. Synthesis and characterization of a novel polytriazole[J]. Journal of Macromolecular Science, Part A: Pure and Applied Chemistry, 2007, 44:175-181.
[2] E Y P, Wan L Q, Li Y J, Huang F R, Du L. Thermally induced structural transformation of polytriazoleimide to polyindoleimide[J]. Chinese Chemical Letters, 2012, (23): 1087-1090.
[3] Wang X F, Wan L Q, Huang F R, Du L. A new triazole-maleimide resin via azide-alkyne click chemistry: Synthesis and characterization[J]. Materials Letters, 2011, 65: 268-270.
[4] Li Y J, Wan L Q, Zhou H, Huang F R., Du L. A novel polytriazole-based organogel formed by the effects of copper ions[J]. Polymer Chemistry, 2013, (4): 3444-3447.
[5] Wan L Q, Tian J J, Huang J Z, Hu Y H, Huang F R, Du L. Curing behavior of a novel polytriazole resin[J]. Journal of Applied Polymer Science, 2007, 106(3): 2111-2116.
[6] Xue L, Wan L Q, Hu Y H, Huang F R, Du L. Thermal stability of a novel polytriazole resin[J]. Thermochimica Acta,2006,448 (2): 147-153.
[7] 费军, 扈艳红, 黄发荣, 杜磊. AZ-1改性炭纤维/聚三唑基复合材料界面研究[J]. 材料工程, 2011, (8): 836-841.
[8] 孙博, 李岩. 复合材料湿热老化行为研究及其耐久性预测[J]. 玻璃钢/复合材料, 2013,(4): 28-34.
[9] 吕新颖, 江龙, 闫亮. 碳纤维复合材料湿热性能研究进展[J]. 玻璃钢/复合材料, 2009, (3): 76-80.
[10] Li M, Liu H X, Gu Y Z, Li Y X, Zhang Z G. Effects of carbon fiber surface characteristics on interfacial bonding of epoxy resin composites subjected to hygrothermal treatments[J]. Applied Surface Science, 2014, 288: 666-672.
[11] 潘宝风, 谭克锋. ɑ-亚麻酸改性不饱和聚酯树脂耐湿热老化性能的研究[J]. 玻璃钢/复合材料, 2005, (6): 24-26.
[12] Sun P, Zhao Y, Luo Y F. Effect of temperature and cyclic hygrothermal aging on the interlaminar shear strength of carbon fiber/bismaleimide(BMI) composites[J]. Materials and Design,2011,32: 4341-4347.
[13] Boubakri A, Elleuch K, Guermazi N, Ayedi H F. Investigations on hygrothermal aging of thermoplastic polyurethane material[J]. Materials and Design, 2009, 30: 3958-3965.
[14] 严艳. 玻璃纤维增强乙烯基酯树脂复合材料在硫酸介质中的耐用性评价[D]. 北京: 北京化工大学, 2008.
[15] GB/T 1449-2005, 纤维增强塑料弯曲性能试验方法[S].
[16] JC/T 773-82(96), 单向单位增强塑料层间剪切强度试验方法[S].
[17] GB/T 1462.2005, 纤维增强塑料吸水性试验方法[S].
[18] 吕小军, 张琦, 马兆庆, 许俊华, 肖文萍. 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): 50-57.
[19] 何曼君, 陈维孝, 董西侠. 高分子物理[M]. 上海: 复旦大学出版社, 2001. 254-257.
[20] 李波. 湿热老化对环氧树脂复合材料电学性能影响研究[D]. 武汉: 武汉理工大学, 2010.
[21] Bulmanis V N, Gunyaev G M, Krivonos V V. In-service durability prediction of structural carbon fibre reinforced plastics[J]. Journal of Materials Engineering, 1992, (3): 2-3.