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Thermal transitions and solidification kinetics of poly(lactic acid) and blends with epoxidized natural rubber

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posted on 17.05.2016 by Leno Mascia, Barry Haworth, Adriano Vignali, Rosario Megna, Domenico Acierno, Pietro Russo
© 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.

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Materials

Published in

Thermochimica Acta

Volume

633

Pages

82 - 90

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.

Publisher

© Elsevier

Version

AM (Accepted Manuscript)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Publication date

2016

Notes

This paper was accepted for publication in the journal Thermochimica Acta and the definitive published version is available at http://dx.doi.org/10.1016/j.tca.2016.04.004

ISSN

0040-6031

Language

en

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