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Laboratory investigation of cracking resistance performance of the cold‐mixed epoxy resin
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2020-09-18 , DOI: 10.1002/app.49923 Xin Yu 1 , Gongying Ding 1 , Fuqiang Dong 1
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2020-09-18 , DOI: 10.1002/app.49923 Xin Yu 1 , Gongying Ding 1 , Fuqiang Dong 1
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Cold‐mix epoxy resin (CER) is an excellent binder material but with weak crack resistance and brittle failure risk. Therefore, it is of significance to find a feasible parameter to constrain the failure potential. To this end, the dynamic mechanical test, tensile test, volume shrinkage test, fracture test, and scanning electron microscopy (SEM) were used to analyze and evaluate mechanical properties, curing shrinkage, and fracture toughness of the CER. Subsequently, the bivariate correlation analysis was used to feature the relationship among different indicators. The results indicated that the amount of curing agent has a significant influence on the tensile strength, elongation at break, volume shrinkage, fracture toughness, and plastic radius of CER. Meanwhile, there is a close correlation between tensile strength, elongation at break, and fracture toughness. Fracture toughness can be used as an evaluation index to represent the crack resistance of CER, and tensile test can be used as a confirmatory parameter. However, the volume shrinkage of CER cannot be ignored. Small voids distributed on the fracture surface of the CER can increase the toughness and then improve the crack resistance of the CER through SEM analysis.
中文翻译：
冷混环氧树脂的抗裂性能实验室研究
冷混环氧树脂（CER）是一种出色的粘合剂材料，但抗裂性弱且有脆性破坏风险。因此，重要的是找到一个可行的参数来约束失效的可能性。为此，动态力学测试，拉伸测试，体积收缩测试，断裂测试和扫描电子显微镜（SEM）用于分析和评估CER的机械性能，固化收缩率和断裂韧性。随后，使用双变量相关分析来表征不同指标之间的关系。结果表明，固化剂的用量对CER的拉伸强度，断裂伸长率，体积收缩率，断裂韧性和塑性半径有显着影响。同时，抗拉强度，断裂伸长率，和断裂韧性。断裂韧性可以用作表示CER的抗裂性的评价指标，而拉伸试验可以用作确认参数。但是，CER的体积收缩不能忽略。通过SEM分析，分布在CER断裂面上的小空隙可以增加韧性，然后提高CER的抗裂性。
更新日期：2020-11-25
中文翻译：
冷混环氧树脂的抗裂性能实验室研究
冷混环氧树脂（CER）是一种出色的粘合剂材料，但抗裂性弱且有脆性破坏风险。因此，重要的是找到一个可行的参数来约束失效的可能性。为此，动态力学测试，拉伸测试，体积收缩测试，断裂测试和扫描电子显微镜（SEM）用于分析和评估CER的机械性能，固化收缩率和断裂韧性。随后，使用双变量相关分析来表征不同指标之间的关系。结果表明，固化剂的用量对CER的拉伸强度，断裂伸长率，体积收缩率，断裂韧性和塑性半径有显着影响。同时，抗拉强度，断裂伸长率，和断裂韧性。断裂韧性可以用作表示CER的抗裂性的评价指标，而拉伸试验可以用作确认参数。但是，CER的体积收缩不能忽略。通过SEM分析，分布在CER断裂面上的小空隙可以增加韧性，然后提高CER的抗裂性。
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