| 引用本文: | 边立平,肖加余,曾竟成,等.极性基团对环氧树脂基体力学性能及吸水特性的影响.[J].国防科技大学学报,2011,33(4):55-59.[点击复制] |
| BIAN Liping,XIAO Jiayu,ZENG Jingcheng,et al.Effects of Polarity Groups on Mechnical and Seawater Sorption Properties of Epoxy Matrixes[J].Journal of National University of Defense Technology,2011,33(4):55-59[点击复制] |
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| 极性基团对环氧树脂基体力学性能及吸水特性的影响 |
| 边立平, 肖加余, 曾竟成, 刘钧, 邢素丽 |
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(国防科技大学 航天与材料工程学院，湖南 长沙 410073)
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| 摘要: |
| 研究了CYD-128/THPA/DMP-30 (CTD)、TDE-85/THPA/DMP-30 (TTD)、CYD-128/IPDA (CI) 与TDE-85/IPDA (TI) 4种环氧树脂基体浇铸体的拉伸、弯曲和耐海水性能，分析了树脂、固化剂类型和分子结构对树脂基体性能的影响。结果表明，使用相同固化剂时，TDE-85树脂固化物的弯曲强度与杨氏模量高于CYD-128树脂固化物；4种树脂基体脆性由大到小依次为：TI>TTD≈CTD>CI；CTD与CI体系酯基、胺基等极性基团含量少，吸水率小于TTD与TI体系；人工海水浸泡后，酯基水解与树脂脆化导致树脂基体拉伸、弯曲强度严重衰减，只有CTD体系拉伸强度在重新干燥后恢复率较高，达到原有强度的92%左右。 |
| 关键词: 环氧树脂 分子结构 力学性能 耐海水性能 |
| DOI： |
| 投稿日期：2010-11-15 |
| 基金项目: |
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| Effects of Polarity Groups on Mechnical and Seawater Sorption Properties of Epoxy Matrixes |
| BIAN Liping, XIAO Jiayu, ZENG Jingcheng, LIU Jun, XING Suli |
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(College of Aerospace and Materials Engineering, National Univ.of Defense Technology, Changsha 410073, China)
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| Abstract: |
| Tensile, flexural and water resistance properties of four kinds of epoxy resin systems, i.e. CYD-128/THPA/DMP-30 (CTD), TDE-85/THPA/DMP-30 (TTD), CYD-128/IPDA (CI) and TDE-85/IPDA (TI) were investigated. The influences of the epoxy resin types, curing agent types and molecular structures on the properties of the epoxy matrixes were discussed. The results show that, cured with a same curing agent, TDE-85epoxy resin (with ester groups) system exhibits higher flexural strength and Young's modulus than CYD-128 (without ester groups) system. The brittleness order of the four epoxy matrixes is TI>TTD≈CTD>CI. As CTD and CI have less content of polarity groups, such as ester and amine, seawater absorption of CTD and CI is smaller than that of TTD and TI. After seawater immersion, part of the ester groups hydrolyzes and the matrix becomes more brittle. As a result, the tensile and flexural strength of the matrixes are decreased significantly. CTD system recovers about 92% of the original tensile strength after drying processing. |
| Keywords: epoxy resin molecular structure mechanical properties seawater resistance |
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