Simultaneously enhanced cryogenic tensile strength and fracture toughness of epoxy resins by carboxylic nitrile-butadiene nano-rubber |
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| Affiliation: | 1. Materials and Textile Engineering College, Jiaxing University, Jiaxing 314001, Zhejiang Province, China;2. Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China;1. College of Chemical Engineering and Pharmaceutics, Henan University of Science and Technology, Luoyang, Henan 471023, PR China;2. Henan Energy and Chemical Industry Group Research Institute Co., Ltd., Zhengzhou, Henan 450001, PR China;3. National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou, Henan 450001, PR China;4. Integrated Composites Laboratory (ICL), Department of Chemical & Biomolecular Engineering, University of Tennessee, Knoxville, TN 37996, USA;5. College of Chemical and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, PR China;1. Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China;2. College of Aerospace Engineering, Chongqing University, Chongqing 400044, China;3. School of Resources and Materials Science, Northeastern University at Qinhuangdao, Qinhuangdao 066004, China;1. Department of Materials Processing, Graduate School of Engineering, Tohoku University, Aoba-yama 6-6-02, Sendai 980-8579, Japan;2. Department of Mechanical Systems Engineering, Faculty of Engineering, Toyama Prefectural University, 5180 Kurokawa, Imizu-shi, Toyama 939-0398, Japan;1. Swinburne University of Technology, Faculty of Science, Engineering and Technology, Hawthorn, Melbourne, VIC 3122, Australia;2. Department of Creative Product Design, College of Creative Design, Asia University, Taichung, Taiwan;3. School of Mechanical, Electrical and Information Engineering, Shandong University, China |
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| Abstract: | Epoxy resins are important matrices for composites. Carboxylic nitrile-butadiene nano-rubber (NR) particles are employed to improve the tensile strength and fracture toughness at 77 K of diglycidyl ether of bisphenol-F epoxy using diethyl toluene diamine as curing agent. It is shown that the cryogenic tensile strength and fracture toughness are simultaneously enhanced by the addition of NR. Also, the fracture toughness at room temperature (RT) is enhanced by the addition of NR. On the other hand, the tensile strength at RT first increases and then decreases with further increasing the NR content up to 5 phr. 5 phr NR is the proper content, which corresponds to the simultaneous enhancements in the tensile strength and fracture toughness at RT. Moreover, the comparison of mechanical properties between 77 K and room temperature indicates that the tensile strength, Young’s modulus and fracture toughness at 77 K are higher than those at RT but the failure strain shows the opposite results. The results are properly explained by the SEM observation. |
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| Keywords: | A Nano-composite A Polymer–matrix composites (PMCs) B Mechanical properties B Fracture toughness |
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