Manufacturing of multilayer graphene oxide/poly(ethylene terephthalate) nanocomposites with tunable crystallinity, chain orientations and thermal transitions

Warning The system is temporarily closed to updates for reporting purpose.

Seyyed Monfared Zanjani, Jamal and Saner Okan, Burcu and Menceloğlu, Yusuf Z. (2016) Manufacturing of multilayer graphene oxide/poly(ethylene terephthalate) nanocomposites with tunable crystallinity, chain orientations and thermal transitions. Materials Chemistry and Physics, 176 . pp. 58-67. ISSN 0254-0584 (Print) 1879-3312 (Online)

This is the latest version of this item.

Full text not available from this repository. (Request a copy)

Abstract

Thermally exfoliated graphene oxide (TEGO) reinforced polyethylene terephthalate (PET) nanocomposites with controlled crystallinity, chain conformations and thermo-mechanical properties were produced with very low TEGO weight fractions by a twin-screw compounding extruder. Tensile modulus was found to increase by 52% by the addition of 1 wt% TEGO. This significant increase in mechanical properties of PET nanocomposites was explained by well intercalation of PET chains through multi-layer graphene sheets and complete coverage of graphene surface by electrostatic interactions. An increase in the ratio of gauche and trans conformations in PET chains indicated that PET nanocomposites became more crystalline by increasing TEGO amount. Transmission electron microscopy observations showed the favorable interaction between TEGO sheets and PET matrix facilitating the dispersion and flattening of graphene sheets into polymeric matrix during elongation. The integration of 1 wt% TEGO sheets into PET matrix enhanced heat distortion temperature from 71 °C for neat specimen upto 91.6 °C at the constant stress of 0.45 MPa, and increased Vicat softening point from 76 °C upto 95 °C. Therefore, the failures of PET considerably reduced by improving short-term heat resistance and its softening properties between glass transition temperature and melting temperature by the incorporation of TEGO sheets.
Item Type: Article
Uncontrolled Keywords: Composite materials; Multilayers; Polymers; Thermal properties; Mechanical properties
Subjects: Q Science > Q Science (General)
T Technology > T Technology (General)
Divisions: Sabancı University Nanotechnology Research and Application Center
Faculty of Engineering and Natural Sciences > Academic programs > Materials Science & Eng.
Faculty of Engineering and Natural Sciences
Depositing User: Jamal Seyyed Monfared Zanjani
Date Deposited: 09 Nov 2016 11:03
Last Modified: 09 Nov 2016 11:03
URI: https://research.sabanciuniv.edu/id/eprint/29749

Available Versions of this Item

Actions (login required)

View Item
View Item