Preparation and Isothermal Crystallization Behavior of Poly(lactic acid)/Graphene Nanocomposites

Abstract:

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Poly(lactic acid) (PLA)/graphene nanocomposites were prepared by solution blending using chloroform as a mutual solvent. Transmission electron microscopy (TEM) was used to examine the quality of the dispersion of graphene in the PLA matrix. The isothermal crystallization behaviors of PLA and PLA/graphene nanocomposites were investigated by differential scanning calorimetry (DSC). The isothermal crystallization kinetics were analyzed by Avrami model based on the DSC data. The results showed that the well dispersed graphene nanosheets could act as a heterogeneous nucleating agent and lead to an acceleration of crystallization during the PLA isothermal crystallization process. According to the Arrhenius equation, the activation energies were found to be -106.9 and -46.6 kJ/mol for pure PLA and PLA/0.1 wt % graphene nanocomposite, respectively. The crystal morphology were characterized with polarizing optical microscope (POM).

Info:

Periodical:

Advanced Materials Research (Volumes 284-286)

Main Theme:

Edited by:

Xiaoming Sang, Pengcheng Wang, Liqun Ai, Yungang Li and Jinglong Bu

Pages:

246-252

DOI:

10.4028/www.scientific.net/AMR.284-286.246

Citation:

Y. H. Chen et al., "Preparation and Isothermal Crystallization Behavior of Poly(lactic acid)/Graphene Nanocomposites", Advanced Materials Research, Vols. 284-286, pp. 246-252, 2011

Online since:

July 2011

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$35.00

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