Effects of functional groups on the graphene sheet for improving the thermomechanical properties of polyurethane nanocomposites |
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| Affiliation: | 1. Department of Polymer Science and Engineering, Hannam Universtiy, Daejeon 305-811, Republic of Korea;2. Department of BIN Fusion Technology, Chonbuk National University, Jeonju 561-756, Republic of Korea;3. Himalaya College of Engineering, Tribhuvan University, Lalitpur, Nepal;4. Department of Engineering Science and Humanities, Central Campus, Institute of Engineering, Tribhuvan University, Kathmandu, Nepal;5. Department of Semiconductors and Chemical Engineering, Chonbuk National University, Jeonju 561-756, Republic of Korea;1. Department of Rubber Technology and Polymer Science, Faculty of Science and Technology, Prince of Songkla University, Pattani Campus, Pattani, 94000, Thailand;2. Faculty of Engineering and Computer Science, University of Applied Sciences Osnabrück, Osnabrück, 49076, Germany;3. Faculty of Science and Industrial Technology, Prince of Songkla University, Surat Thani Campus, Surat Thani, 84000, Thailand;1. Faculty of Engineering, China University of Geosciences (Wuhan), 388 Lumo Road, Wuhan, Hubei 430074, PR China;2. State Key Laboratory of Fire Science, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, PR China;3. School of Mechanical and Automotive Engineering, South China University of Technology, Wushan Road 381, Guangzhou 510641, PR China;4. School of Architecture and Civil Engineering, Anhui University of Technology, 59 Hudong Road, Ma’anshan, Anhui 243002, PR China;1. School of Mechanical Engineering, Vellore Institute of Technology, Vellore 632 014, India;2. School of BioSciences and Technology, Vellore Institute of Technology, Vellore 632 014, India |
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| Abstract: | Dispersibility of graphene sheets in polymer matrices and interfacial interaction are challenging for producing graphene-based high performance polymer nanocomposites. In this study, three kinds nanofillers; pristine graphene nanoplatelets (GNPs), graphene oxide (GO), and functionalized graphene sheet (FGS) were used to prepare polyurethane (PU) composite by in-situ polymerization. To evaluate the efficacy of functional groups on the graphene sheets, PU reinforced with GNPs, GO, and FGS were compared through tensile testing and dynamic mechanical thermal analysis. The Young's moduli of 2 wt% GO and FGS based PU nanocomposites were found significantly higher than that of same amount of GNPs loading as an evidence of the effect of functional groups on graphene sheets for the mechanical reinforcement. The strong interaction of FGS with PU was responsible to exhibit notably high modulus (25.8 MPa) of 2 wt% FGS/PU composite than the same amount of GNPs and GO loading even at elevated temperature (100 °C). |
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| Keywords: | A. Polymer-matrix composites (PMCs) B. Mechanical properties B. Thermomechanical properties |
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