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Title: Thermal transitions and solidification kinetics of poly(lactic acid) and blends with epoxidized natural rubber
Authors: Mascia, Leno
Haworth, Barry
Vignali, Adriano
Megna, Rosario
Acierno, Domenico
Russo, Pietro
Keywords: Crystallization kinetics
Epoxidized natural rubber
Poly(lactic acid)
Issue Date: 2016
Publisher: © IEEE
Citation: MASCIA, L. ...et al., 2016. Thermal transitions and solidification kinetics of poly(lactic acid) and blends with epoxidized natural rubber. Thermochimica Acta, 633, pp. 82-90.
Abstract: © 2016 Elsevier B.V. All rights reserved. The reactivity of polylactic acid (PLA) with epoxidized natural rubber (ENR50) was confirmed by monitoring the changes in melt viscosity during mixing and by TGA runs. The plasticization resulting from a partial miscibilization of ENR50 during mixing was found to have opposite effects on the crystallization of the PLA matrix, depending on the temperature scanning mode. An increase in heat of crystallization (ΔHc) with increasing temperature scanning rate was observed when heated from the glassy state, while a corresponding reduction in ΔHc was obtained in cooling scans from the melt. Studies on the kinetics of events have shown that the classical Kissinger plots for crystallization by heating from the glassy state display a variable activation energy for the case of the reactive blend. The vitrification kinetics, on the other hand, could be modelled quite accurately with the Mahadevan method for all systems, including an intrinsically amorphous PLA.
Description: This paper is in closed access until 7th April 2017.
Version: Accepted for publication
DOI: 10.1016/j.tca.2016.04.004
URI: https://dspace.lboro.ac.uk/2134/21262
Publisher Link: http://dx.doi.org/10.1016/j.tca.2016.04.004
ISSN: 0040-6031
Appears in Collections:Closed Access (Materials)

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