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Effect of polycarbonate structure and reduction time on graphene oxide dispersion
Author(s) -
Lee Bom Yi,
Park Ju Young,
Kim Youn Cheol
Publication year - 2015
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.3559
Subject(s) - materials science , graphene , oxide , thermogravimetric analysis , polycarbonate , dispersion (optics) , composite material , modulus , chemical engineering , nanotechnology , optics , physics , engineering , metallurgy
Polycarbonate (PC)/graphene oxide (GO) composites with different GO reduction time and PC types were prepared by using a twin screw extruder at 260 °C after solution mixing with chloroform. The chemical reaction degree of PC/GO composites with GO reduction time was confirmed by C–H stretching peak at 3000 cm −1 , and the chemical reaction degree decreased with GO reduction time. The slope for storage ( G ′) versus loss ( G ″) modulus plot decreases with an increase in heterogeneous property of the polymer melts. So we can check the GO dispersion of the PC/GO composites using by the slop for G ′– G ″ plot. According to the G ′– G ″ slopes for PC/GO composite with GO reduction time, GO was well dispersed within PC matrix when the reduction time decreased. It was re‐confirmed by atomic force microscope (AFM) results. Based on the degradation temperature by Thermogravimetric analysis, G ′– G ″ slopes, and surface roughness by AFM, the branched PC was better than linear PC for the GO dispersion within PC matrix. The fact was also confirmed by tensile test results that the Young's modulus increased with the improvement of GO dispersion. Copyright © 2015 John Wiley & Sons, Ltd.