RT info:eu-repo/semantics/article
T1 New non-destructive optical approach to determine the crystallization kinetics of PLA under a CO2 atmosphere with spatial and temporal resolution
A1 Martín de León, Judit
A1 Bernardo García, Victoria
A1 Solórzano Quijano, Eusebio
A1 Rodríguez Pérez, Miguel Ángel
K1 Polylactide
K1 Ácido poliláctico
K1 Crystallization kinetics
K1 Cinética de cristalización
K1 Carbon dioxide
K1 Dióxido de carbono
AB The kinetics of crystallization of Polylactic Acid (PLA) in the presence of CO2 pressures from 1.5 to 4 MPa, has been studied by measuring the optical absorbance evolution of the material with time. To perform this study, an own-designed pressure vessel provided with windows has been used. The non-destructive approach presented in this paper allows for obtaining very accurate crystallinity data as a function of time for a wide range of pressures. Besides, this new approach allows measuring with spatial resolution, i.e., obtaining the crystallization kinetics' evolution in different areas of the samples, which helps to analyze in detail the crystallization mechanisms by using the Avrami approach. The results obtained have allowed observing an unexpected peak in the absorbance curve connected with the physical phenomena taking place during the CO2 uptake and the associated crystallization of PLA.
PB Elsevier
SN 0142-9418
YR 2021
FD 2021
LK https://uvadoc.uva.es/handle/10324/47891
UL https://uvadoc.uva.es/handle/10324/47891
LA eng
NO Polymer Testing, 2021, vol. 98. 107201
NO Producción Científica
DS UVaDOC
RD 20-may-2024