THERMAL TRANSITIONS _REVISED__ FULL SCRIPT REVISED - FINAL.pdf (907.88 kB)
Download fileThermal transitions and solidification kinetics of poly(lactic acid) and blends with epoxidized natural rubber
journal contribution
posted on 2016-05-17, 13:23 authored 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 ActaVolume
633Pages
82 - 90Citation
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
© ElsevierVersion
- 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
2016Notes
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.2016.04.004ISSN
0040-6031Publisher version
Language
- en