Premium
Thermal degradation kinetics study of molten polylactide based on Raman spectroscopy
Author(s) -
Lin Zenan,
Guo Xuemei,
He Zhangping,
Liang Xianrong,
Wang Mengmeng,
Jin Gang
Publication year - 2021
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.25568
Subject(s) - raman spectroscopy , degradation (telecommunications) , materials science , kinetics , rheology , thermal , kinetic energy , chemical engineering , thermal analysis , spectroscopy , analytical chemistry (journal) , composite material , thermodynamics , chemistry , organic chemistry , optics , telecommunications , physics , quantum mechanics , computer science , engineering
The thermal degradation of polylactide (PLA) during melt processing may lead to poor product properties. In this study, a unique Raman system was applied to explore the thermal degradation kinetics of molten PLA under five different temperatures and three atmospheres. It was found that the intensity of specific Raman bands correlated with the concentration of functional groups in the PLA during the degradation process. Kinetic models for thermal degradation were established based on the intensity of the characteristic band of C‐COO. Kinetic parameters determined by kinetic models quantitatively revealed the effect of temperature and atmosphere on thermal degradation. Furthermore, time sweep rheological tests using the same degradation conditions were performed for verification, and the results corroborated the spectral analyses. This investigation demonstrates the feasibility of Raman spectroscopy for thermal degradation kinetic analysis.