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Please use this identifier to cite or link to this item: http://hdl.handle.net/10119/17072

Title: Transparent poly(lactic acid) film crystallized by annealing beyond glass transition temperature
Authors: Saitou, Ken-ichi
Yamaguchi, Masayuki
Keywords: Poly(lactic acid)
Polymer processing
Issue Date: 2020-04-04
Publisher: Springer Nature
Magazine name: Journal of Polymer Research
Volume: 27
Start page: 104
DOI: 10.1007/s10965-020-02071-y
Abstract: The effect of post-processing annealing beyond the glass transition temperature on optical transparency was studied using poly(lactic acid) (PLA) films containing a nucleating agent such as N,N’-ethylenebis(stearamide) (EBS) or N,N’-ethylenebis(12-hydroxystearamide) (EBHS). Although the PLA films without the nucleating agent became opaque after exposure to annealing, the film with an appropriate amount of the nucleating agent was found to be transparent (the haze value was lower than 10%). Since the crystallinity was enhanced by annealing, the film showed excellent heat resistance. As compared with EBS, moreover, EBHS had a better capability to produce a transparent film because the aggregates, which appeared during cooling from the molten state, were small. In the case of EBHS, a network structure of fibrous EBHS in molten PLA was confirmed, which was responsible for the reduced size of the PLA crystals and prevented spherulite formation.
Rights: This is the author-created version of Springer, Ken-ichi Saitou, Masayuki Yamaguchi, Journal of Polymer Research, 27, 2020, 104. The original publication is available at www.springerlink.com, https://doi.org/10.1007/s10965-020-02071-y
URI: http://hdl.handle.net/10119/17072
Material Type: author
Appears in Collections:c10-1. 雑誌掲載論文 (Journal Articles)

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