Evaluation of thermal,mechanical, and electrical properties of PVDF/GNP binary and PVDF/PMMA/GNP ternary nanocomposites |
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| Affiliation: | 1. Physics Department, Bu-Ali Sina University, Hamedan 65174, Iran;2. Department of Industrial Engineering, University of Trento, via Sommarive 9, Trento, 38123, Italy;1. Rubber Technology Centre, Indian Institute of Technology Kharagpur, Kharagpur 721302, India;2. Chemical Engineering Department, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia;1. College of Chemistry and Chemical Engineering, Xi’an University of Science & Technology, Xi’an 710054, China;2. Key Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, Harbin University of Science and Technology, Harbin 150080, China;1. Dielectric Research Laboratory, Department of Physics, Jai Narain Vyas University, Jodhpur, 342 005, India;2. CSIR-National Institute of Science Communication and Information Resources, New Delhi, 110 012, India;1. School of Chemistry and Chemical Engineering, Xi’an University of Science & Technology, Xi’an 710054, People’s Republic of China;2. Key Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, Harbin University of Science and Technology, Harbin 150080, People’s Republic of China |
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| Abstract: | Graphene nanoplatelet (GNP) was incorporated into poly(vinylidene fluoride) (PVDF) and PVDF/poly(methyl methacrylate) (PMMA) blend to achieve binary and ternary nanocomposites. GNP was more randomly dispersed in binary composites compared with ternary composites. GNP exhibited higher nucleation efficiency for PVDF crystallization in ternary composites than in binary composites. GNP addition induced PVDF crystals with higher stability; however, PMMA imparted opposite effect. The binary composite exhibited lower thermal expansion value than PVDF; the value further declined (up to 28.5% drop) in the ternary composites. The storage modulus of binary and ternary composites increased to 23.1% and 53.9% (at 25 °C), respectively, compared with PVDF. Electrical percolation threshold between 1 phr and 2 phr GNP loading was identified for the two composite systems; the ternary composites exhibited lower electrical resistivity at identical GNP loadings. Rheological data confirmed that the formation of GNP (pseudo)network structure was assisted in the ternary system. |
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| Keywords: | A. Nano-structures A. Polymer–matrix composites (PMCs) B. Thermal properties B. Mechanical properties |
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