We study experimentally the influence of mass fraction of L-20 hardener cold cure on mechanical properties of epoxy diane resin ED-20. We measure the hardness, tensile strength, bending strength and impact strength of resin at different values of the hardener mass fraction. It is found that the ratio hardener mass fraction of 1:0.9 leads to the highest values of the hardness, tensile strength, compressive strength and bending strength. The impact viscosity is maximum at the ratio hardener mass fraction of 1:0.8. The optimal ratio of a non-toxic safe hardener to the resin is derived based on obtained mechanical characteristics.

中文翻译：

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固化环氧树脂的机械性能

实验研究了L-20固化剂冷固化质量分数对环氧二烷树脂ED-20力学性能的影响。我们测量不同固化剂质量分数值下树脂的硬度、拉伸强度、弯曲强度和冲击强度。发现硬化剂质量分数为1:0.9时，硬度、抗拉强度、抗压强度和弯曲强度的值最高。冲击粘度在硬化剂质量分数为 1:0.8 时最大。无毒安全硬化剂与树脂的最佳比例是基于获得的机械特性得出的。