Interfacial and wetting properties of carbon fiber reinforced epoxy composites with different hardeners by electrical resistance measurement |
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| Institution: | 1. Department of Materials Engineering and Convergence Technology, Engineering Research Institute, Gyeongsang National University, Jinju 660-701, Republic of Korea;2. Department of Mechanical Engineering, The University of Utah, Salt Lake City, UT 84112, USA;1. Laboratory of Theoretical and Applied Mechanics, Graduate Programme in Mechanical Engineering, Universidade Federal Fluminense, Rua Passo da PátriCa 156, 24210-240, Niterói, RJ, Brazil;2. Petrobras – Petróleo Brasileiro S.A., Research Center (CENPES), 21941-915, Cidade Universitária - Ilha do Fundão, Rio de Janeiro, RJ, Brazil;1. Structural Impact Laboratory (SIMLab), Department of Structural Engineering, NTNU, Norwegian University of Science and Technology, NO-7491, Trondheim, Norway;2. SINTEF Materials and Chemistry, Department of Materials and Nanotechnology, PB 124 Blindern, NO-0314, Oslo, Norway;1. Goodyear S.A. Colmar-Berg, L-7750, Luxembourg;2. Department of Mechanical Engineering, Aalto University, Espoo, 00076, Finland;1. Department of Polymer Science and Engineering, Hannam University, Daejeon 305-811, Republic of Korea;2. Underground Solutions Inc., Poway, CA, USA |
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| Abstract: | In this research, interfacial and wetting properties of N,N,N,N-tetraglycidyl-4,4-diaminodiphenylmethane (TGDDM) epoxy resin with two hardeners with different chemical structure were evaluated by electrical resistance (ER) measurement. The heat of reaction of TGDDM epoxy with the two different hardeners, 33 and 44 di-amino di-phenyl sulphone (DDS), was analyzed by differential scanning calorimetry (DSC). The TGDDM epoxy exhibited different mechanical properties with the two different DDS hardeners. Combined ER, wetting measurements and the microdroplet test were used for evaluating the spreading effect and interfacial shear strength (IFSS) of carbon fiber (CF) reinforced TGDDM epoxy composites with these different hardeners. The heat of reaction and mechanical properties of TGDDM/DDS were influenced by the chemical structure and different free volumes of the epoxy resins. The relationships between the ER-wetting results and the IFSS were internally consistent. Ultimately it was demonstrated that ER measurements makes it possible to estimate the interfacial and wetting properties of CF reinforced epoxy composites. |
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| Keywords: | TGDDM Wetting Micro-mechanics Process monitoring |
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