Journal of Applied Polymer Science · 2007 · 35 citations · 25 references
Natural SciencesMaterials EngineeringMaterials ScienceNanomaterialsPolymer ChemistryPolymer MaterialsComposite MaterialsNanocompositesNanotubesPolymer CharacterizationPolymer CompositesPolymer-matrix CompositesCarbon Nanotube CompositesCarbon Nanotube Mechanical PropertiesCarbon Nanotube NanocompositesNanocomposite FilmsPolyethylene TerephthalateRheological PropertiesSurface Functional GroupsViscosity
Abstract Poly(ethylene terephthalate) (PET)/multiwalled carbon nanotube (MWCNT) composites were prepared by in situ polymerization. To improve the dispersion of MWCNTs in the PET matrix, functionalized MWCNTs having acid groups (acid‐MWCNTs) and acetic groups (acetic‐MWCNTs) on their surfaces were used. The functional groups were confirmed by infrared spectrometry. Scanning electron microscopy showed that acetic‐MWCNTs had a better dispersion in the PET matrix than pristine MWCNTs and acid‐MWCNTs. A reaction between PET and acetic‐MWCNTs was confirmed by a shift of the Raman G band to a higher frequency and an increase of the complex viscosity in the rheological properties. The composites containing functionalized MWCNTs showed a large increase in their tensile strengths and moduli. The values of the strengths and moduli of the PET/acetic‐MWCNT composites were higher than those of the PET/acid‐MWCNT composites. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2008
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