Issue 14, 2021

Temperature dependent poly(l-lactide) crystallization investigated by Fourier transform terahertz spectroscopy

Abstract

Poly(L-lactide) (PLLA) was investigated by Fourier transform terahertz (THz) spectroscopy over the frequency range of 1.0–8.5 THz. THz absorption spectra were acquired for PLLA samples isothermally crystallized at the temperature of 80–140 °C after melt-quenching. Characteristic PLLA absorption peaks were identified at 1.8, 4.0, 4.7, and 7.1 THz for the 80 °C sample; higher crystallization temperature resulted in a blue shift of the absorption peak frequency. The higher two peaks (4.7 and 7.1 THz), which are present not only in α-form but also in δ-form, were attributed to the intermolecular vibration of the PLLA chain, depending on the lattice spacing and crystallinity. In contrast, the 4.0 THz peak was intrinsically in α-form, thus enabling its use as an indicator in the optimization of PLLA polymorphism. Broadband THz spectroscopy is a nondestructive and noninvasive evaluation technique for biodegradable polymers.

Graphical abstract: Temperature dependent poly(l-lactide) crystallization investigated by Fourier transform terahertz spectroscopy

Supplementary files

Article information

Article type
Paper
Submitted
05 Marts 2021
Accepted
30 Maijs 2021
First published
02 Jūn. 2021
This article is Open Access
Creative Commons BY-NC license

Mater. Adv., 2021,2, 4630-4633

Temperature dependent poly(L-lactide) crystallization investigated by Fourier transform terahertz spectroscopy

S. Ariyoshi, S. Ohnishi, H. Mikami, H. Tsuji, Y. Arakawa, S. Tanaka and N. Hiroshiba, Mater. Adv., 2021, 2, 4630 DOI: 10.1039/D1MA00195G

This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. You can use material from this article in other publications, without requesting further permission from the RSC, provided that the correct acknowledgement is given and it is not used for commercial purposes.

To request permission to reproduce material from this article in a commercial publication, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party commercial publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements