Crystallization of Amorphous Poly(Lactic Acid) Induced by Vapor of Acetone to Form High Crystallinity and Transparency Specimen

Naga, Naofumi and Yoshida, Yuji and Noguchi, Keiichi and Murase, Shigemitsu (2013) Crystallization of Amorphous Poly(Lactic Acid) Induced by Vapor of Acetone to Form High Crystallinity and Transparency Specimen. Open Journal of Polymer Chemistry, 03 (02). pp. 29-33. ISSN 2165-6681

[thumbnail of OJPChem_2013051018205962.pdf] Text
OJPChem_2013051018205962.pdf - Published Version

Download (649kB)

Abstract

Crystallization of amorphous poly(lactic acid) (PLA) was investigated by exposing to vapor of acetone. The vapor of acetone induced crystallization of the amorphous PLA effectively. It took about 24 min to complete the crystallization of a 1 cm × 2 cm × 0.55 mm specimen at 25℃. The crystallization rate increased with increasing of conducting temperature. The crystallization method yielded high crystallinity about 40%, which was almost equal to that attained by annealing or immersion methods conducted as references. The specimens crystallized by the vapor showed higher transparency than those prepared by the reference methods. The crystallization was induced by diffusion of acetone into the amorphous phase of PLA, and polarized optical photomicrographs cleared that the diffusion obeyed Fick type diffusion.

Item Type: Article
Subjects: Middle East Library > Chemical Science
Depositing User: Unnamed user with email support@middle-eastlibrary.com
Date Deposited: 23 Jun 2023 06:41
Last Modified: 08 Jun 2024 08:55
URI: http://editor.openaccessbook.com/id/eprint/1187

Actions (login required)

View Item
View Item