研究了高弹性聚氨酯环氧改性双酚F型环氧树脂固化体系在室温和液氮温度77 K下的力学性能,观察研究了断裂面的微观形貌与力学性能的关系.结果表明:聚氨酯环氧能够有效地改善环氧树脂在室温和低温下的力学性能,尤其在低温下具有较好的增强增韧效果.当聚氨酯环氧的质量含量为30%时,综合性能达到最佳,拉伸强度在室温和77 K下分别为87.35和118.73 MPa,冲击强度分别为15.76和21.88 MPa.聚氨酯环氧的加入使体系玻璃化温度下降为92.4℃,能满足低温应用要求.
参考文献
| [1] | Rashkovan A;Korabei' nikov Y G .The Effect of Fiber Surface Treatment on its Strength and Adhesion to the Matrix[J].Composites Science and Technology,1997,57(08):1017-1022. |
| [2] | T. Ueki;S. Nishijima;Y. Izumi .Designing of epoxy resin systems for cryogenic use[J].Cryogenics,2005(2):141-148. |
| [3] | Chen QA.;Gao BJ.;Chen JL. .Properties of impregnation resin added to multifunctional epoxy at cryogenic temperature[J].Journal of Applied Polymer Science,2003(5):1385-1389. |
| [4] | 税荣森,初增泽,黄鹏程.聚醚砜对环氧树脂在低温下韧性和力学性能的影响[J].宇航材料工艺,2006(03):33-35,40. |
| [5] | 孙志杰,殷立新,梁志勇,张佐光.PSF/环氧共混基体体系增韧机理研究[J].复合材料学报,2000(01):42-45. |
| [6] | Yang G;Fu S Y;Yang J P.Preparation and Mechanical Properties of Modified Epoxy Resins with Flexible Diamines[J].Polymer,2006(47) |
| [7] | Prabu AA.;Alagar A. .Mechanical and thermal studies of intercross-linked networks based on siliconized polyurethane-epoxy/unsaturated polyester coatings [Review][J].Progress in Organic Coatings: An International Review Journal,2004(3):236-243. |
| [8] | Shangjin He;Keyu Shi;Jie Bai;Zengkun Zhang;Liang Li;Zongjie Du;Baolong Zhang .Studies on the properties of epoxy resins modified with chain-extended ureas[J].Polymer: The International Journal for the Science and Technology of Polymers,2001(23):9641-9647. |
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