Mechanical properties of epoxy resins and glass/epoxy composites at cryogenic temperatures
Mechanical properties of epoxy resins and glass/epoxy composites at cryogenic temperatures
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DOI：
10.1080/00222346708212358
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发表时间：
1967
期刊：
影响因子：
--
通讯作者：
L. Soffer;R. Molho
中科院分区：
文献类型：
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作者：
L. Soffer;R. Molho
摘要研究了四种改性环氧树脂体系的力学性能。拉伸性能（包括强度、模量和伸长率）、缺口韧性、冲击强度、线性热收缩系数和抗热震性在75、−320和−423°F下测定。层间剪切强度（海军Ordovic实验室水平剪切和短跨度剪切）获得的玻璃纤维缠绕复合材料试样在三个温度。具有最佳低温性能的两个系统是混杂环氧/聚氨酯（树脂4A）和高度改性的双酚A环氧（树脂2）。在选择最佳的系统，相同的测试（除了缺口韧性，冲击强度，和短跨度剪切）进行缠绕复合材料试样在三个温度。在这些测试中，树脂4A的性能优于树脂2的性能，或至少与树脂2的性能相当。
Abstract The mechanical properties of four modified-epoxy resin systems were investigated. Tensile properties (including strength, modulus, and elongation), notch toughness, impact strength, the coefficient of linear thermal contraction, and thermal-shock resistance were determined for cast-resin specimens at 75, −320, and −423°F. Inter-laminar shear strengths (Naval Ordnance Laboratory horizontal shear and short-span shear) were obtained for glass-filament-wound-composite specimens at the three temperatures. The two systems with the best cryogenic properties were a hybridepoxy/polyurethane (resin 4A) and a highly modified bisphenol-A epoxy (resin 2). In choosing the optimum system, the same tests (except for notch toughness, impact strength, and short-span shear) were performed on filament-wound-composite specimens at the three temperatures. In these tests the performance of resin 4A was better than, or at least comparable to, that of resin 2.