Investigation of thermomechanical properties and matrix–filler interaction on polyimide/graphene oxide composites |
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| Authors: | Kumari P Pramoda Khine Y Mya Ting T Lin Xuehong Lu Chaobin He |
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| Affiliation: | 1. Institute of Materials Research and Engineering (IMRE), (A*STAR) Agency for Science, Technology and Research, Singapore 117602, Singapore;2. School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore;3. Department of Materials Science and Engineering, National University of Singapore, Singapore 117574, Singapore |
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| Abstract: | We report, the preparation of nanocomposites having polyimide (PI) as matrix and graphene oxide (GO) as filler, analyses of matrix–filler interactions, and enhancements in thermomechanical properties of PI/GO as compared with pristine PI. The matrix–filler interactions were analyzed by 1H NMR, X‐ray photoelectron spectroscopy, and density functional theory calculations. The data suggested stronger matrix–filler interactions in PI/GO as compared with PI/G composites. The stronger matrix–filler interactions and homogeneous dispersion of fillers lead to a significant enhancement in mechanical properties in PI/GO nanocomposites. Thus, with just 1 wt% GO content, the modulus of PI/GO composite increased by ～106% as compared with pristine PI. Finally, thermal expansion coefficients of the nanocomposites are also investigated. A plausible hypothesis has been proposed in the text to explain the observed matrix–filler interactions and the subsequent property enhancements in nanocomposites. POLYM. ENG. SCI., 2012. © 2012 Society of Plastics Engineers |
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