Investigation of free volume and the interfacial,and toughening behavior for epoxy resin/rubber composites by positron annihilation |
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| Affiliation: | 1. Institute of Applied Chemistry, Shaoxing University, Shaoxing 312000, PR China;2. Institute of High Energy Physics, The Chinese Academy of Science, Beijing 100049, PR China;1. Western Washington University, 516 High Street, Bellingham, WA, 98225, USA;2. The University of Southern Mississippi, 118 College Drive, Hattiesburg, MS 39406, USA;3. Liaoning Normal University, Huanghe Road, Shahekou, Dalian, Lianoning, China;1. The University of Southern Mississippi, 118 College Drive, Hattiesburg, MS 39406, USA;2. Liaoning Normal University, Huanghe Road, Shahekou, Dalian, Lianoning, China;1. Mechanical Engineering Department, Thapar University, Patiala, Punjab 147004, India;2. Chemical Engineering Department, Thapar University, Patiala, Punjab 147004, India;1. Research and Development Centre, Bharathiar University, Coimbatore 641046, Taimlnadu, India;2. Department of Chemistry, Government Arts College, Kumbakonam, Tamilnadu, India;1. State Key Laboratory of Materials-Oriented Chemical Engineering, College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, PR China;2. Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing 210009, PR China;3. Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing 210009, PR China |
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| Abstract: | An epoxy resin (EP) matrix has been modified with carboxyl-randomized butadiene-acrylonitrile (CRBN) rubber and hydroxyl-terminated butadiene-acrylonitrile rubber (HTBN). When the rubber content was low (⩽5%), the free volume size varied slowly, meanwhile, the free volume size of EP/HTBN system was smaller than EP/CRBN system. With further addition of rubber component (⩾7%), the free volume size of the composite increased quickly. In this case, the free volume size of EP/HTBN system was larger than EP/CRBN system. The intermediate positron lifetime component (I2) was affected by the structure of the interface layer between rubber particles and EP matrix. The different free volume properties could be attributed to the compatibility between rubber and EP. |
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