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Polymers 2017, 9(9), 429; doi:10.3390/polym9090429

Graphene Oxide-Graft-Poly(l-lactide)/Poly(l-lactide) Nanocomposites: Mechanical and Thermal Properties

College of Chemistry, Nanchang University, Nanchang 330031, China
College of Science, Nanchang Institute of Technology, Nanchang 330029, China
Author to whom correspondence should be addressed.
Received: 31 July 2017 / Revised: 30 August 2017 / Accepted: 3 September 2017 / Published: 7 September 2017
(This article belongs to the Special Issue Graphene-Polymer Composites)
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The surface modification of graphene sheets with polymer chains may greatly hinder its aggregation and improve its phase compatibility with a polymer matrix. In this work, poly(l-lactic acid)-grafted graphene oxide (GO-g-PLLA) was prepared via a simple condensation polymerization method, realizing its dispersion well in organic solvents, which demonstrated that the surface of GO changed from hydrophilic to hydrophobic. GO-g-PLLA can disperse homogeneously in the PLLA matrix, and the tensile test showed that the mechanical properties of GO-g-PLLA/PLLA were much better than that of GO/PLLA; compared with GO, only 3% GO-g-PLLA content can realize a 37.8% increase in the tensile strength for their PLLA composites. Furthermore, the differential scanning calorimetry (DSC) and polarized optical microscopy (POM) results demonstrated that GO-g-PLLA shows a nucleating agent effect and can promote the crystallization of PLLA. View Full-Text
Keywords: graphene; poly(l-lactide); surface modification; nanocomposite graphene; poly(l-lactide); surface modification; nanocomposite

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Wang, L.-N.; Guo Wang, P.-Y.; Wei, J.-C. Graphene Oxide-Graft-Poly(l-lactide)/Poly(l-lactide) Nanocomposites: Mechanical and Thermal Properties. Polymers 2017, 9, 429.

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