Non-isothermal crystallization kinetics of poly (lactic acid)/graphene nanocomposites
-
Yanhua Chen
,
Qun Gu
Abstract
Poly(lactic acid) (PLA)/graphene nanocomposites were prepared by solution blending and the dispersibility of graphene in the PLA matrix was examined by transmission electron microscopy (TEM). The non-isothermal crystallization behaviors of pure PLA and PLA/graphene nanocomposites from the melt were investigated by differential scanning calorimetry (DSC). The results showed that the graphene could play a role as a heterogeneous nucleating agent during the non-isothermal crystallizing process of PLA, and accelerate the crystallization rate. The non-isothermal crystallizing data were analyzed with the Avrami, Ozawa and Mo et al. models and the crystallization parameters of the samples were obtained. It is demonstrated that the combination of the Avrami and Ozawa models developed by Mo et al. was successful in describing the non-isothermal crystallization process for pure PLA and its nanocomposite. According to the Kissinger equation, the activation energies were found to be -154.3 and -179.5 kJ/mol for pure PLA and PLA/0.1 wt% graphene nanocomposite, respectively. Furthermore, the spherulite growth behavior was investigated by polarized optical microscopy (POM) and the results also supported the DSC data.
©2013 by Walter de Gruyter Berlin Boston
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Articles in the same Issue
- Masthead
- Masthead
- Original Articles
- A numerical study of solidification and viscous dissipation effects on polymer melt flow in plane channels
- Structure-property relationship of biodegradable poly(butylene succinate)/polycaprolactone coated inorganic particle composites
- Comparison of injection molding processability of polylactic acid and high density polyethylene via computational approach
- Elastomer nanocomposites based on NBR/BR/nanoclay: morphology and mechanical properties
- Effect of glycerol concentration and temperature on the rheological properties of cassava starch solutions
- Electron-beam irradiation of low density polyethylene/ethylene vinyl acetate blends
- Non-isothermal crystallization kinetics of poly (lactic acid)/graphene nanocomposites
- Interfacial properties and fatigue behavior of carbon fiber epoxy laminate composites
- Effect of crystalline structure on the mechanical response of polypropylene under cyclic deformation
- Erratum
- Effect of solvents and thermal annealing on the morphology development of a novel block copolymer ionomer: a case study of sulfonated polystyrene-block-fluorinated polyisoprene; J. Polym. Eng. 2013, 33, 49–59
