Crystallization of polylactides examined by vibrational circular dichroism of intra- and inter-chain chiral interactions

Herein, vibrational circular dichroism (VCD) measurements were carried out to study the kinetics of cold-crystallized poly( d -lactide) (PDLA) at the molecular level via qualitative analysis. The amplification of the VCD signals from intra- and inter-chain chiral interactions suggests the formation...

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Bibliographic Details
Published in:Soft matter 2022-04, Vol.18 (14), p.2722-2725
Main Authors: Chao, Yi-Kuan, Praveena, N. M, Yang, Kai-Chieh, Gowd, E. Bhoje, Ho, Rong-Ming
Format: Article
Language:English
Subjects:
Calorimetry
Chains
Circular dichroism
Crystallization
Dichroism
Differential scanning calorimetry
Fourier analysis
Fourier transforms
Infrared analysis
Nucleation
Polylactic acid
Qualitative analysis
X-ray diffraction
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Summary:Herein, vibrational circular dichroism (VCD) measurements were carried out to study the kinetics of cold-crystallized poly( d -lactide) (PDLA) at the molecular level via qualitative analysis. The amplification of the VCD signals from intra- and inter-chain chiral interactions suggests the formation of partially ordered PDLA, followed by heterogeneous nucleation for crystallization. These results were further supported by differential scanning calorimetry (DSC), wide-angle X-ray diffraction (WAXD) and Fourier transform infrared (FTIR) spectroscopy analyses. Cold-crystallized PDLA was studied by time-resolved VCD analysis, providing molecular level insights for crystallization via intra- and inter-chain chiral interactions.
ISSN:1744-683X
1744-6848
DOI:10.1039/d2sm00060a