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

Chao, Yi-Kuan; Praveena, N M; Yang, Kai-Chieh; Gowd, E Bhoje; Ho, Rong-Ming · Soft Matter · 2022

basic_science · Level V

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Abstract

Herein, vibrational circular dichroism (VCD) measurements were carried out to study the kinetics of cold-crystallized poly(D-lactide) (PDLA) at the molecular level <i>via</i> 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.