Journal
COMPOSITES PART B-ENGINEERING
Volume 158, Issue -, Pages 302-310Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesb.2018.10.004
Keywords
PLLA; Isothermal crystallization; Nucleation; Graphene oxide
Funding
- Iran Polymer and Petrochemical Institute [2204]
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The crystallization behavior of Poly(L-lactic acid) (PLLA) was studied in the presence of different nanoparticles. Two types of nanoparticles including Graphene oxide (GO) and Poly(ethylene glycol) (PEG)-grafted Graphene oxide (GO-g-PEG) were examined at various concentrations. SEM images revealed an improvement in the dispersion of nanoparticles after grafting PEG chains on the GO surface. Kinetic analysis and morphological observations indicated that GO-g-PEG has enhancing effects on the crystallization rate and nucleation ability of PLLA. This was attributed to the improved dispersion of GO-g-PEG in the PLLA matrix. The contribution of nucleation and growth steps was examined using generalized Lauritzen-Hoffman model.
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