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Please use this identifier to cite or link to this item: http://hdl.handle.net/10119/16125

Title: Modifying the thermal and mechanical properties of poly(lactic acid) by adding lithium trifluoromethanesulfonate
Authors: Tomie, Shota
Tsugawa, Naoya
Yamaguchi, Masayuki
Keywords: Poly(lactic acid)
Glass transition temperature
Issue Date: 2018-08-27
Publisher: Springer
Magazine name: Journal of Polymer Research
Volume: 25
Number: 9
Start page: Article:206
DOI: 10.1007/s10965-018-1605-4
Abstract: The effect of the addition of lithium trifluoromethanesulfonate (LiCF_3SO_3) on the linear viscoelastic properties, crystallization behavior, and mechanical properties of poly(lactic acid) (PLA) was studied. The glass transition temperature (T_g) was enhanced by adding LiCF_3SO_3, without any loss of transparency of the PLA. This was attributed to the ion-dipole interaction between the lithium cation and oxygen atom in the PLA carbonyl group. The interaction weakened at higher temperature. Consequently, the rheological terminal region was clearly detected, which suggested that the system possessed good melt-processability. The Young’s modulus and yield stress at room temperature were also enhanced by the addition of LiCF_3SO_3, although the toughness was reduced due to the brittle failure. Finally, the presence of LiCF_3SO_3 retarded the crystallization of PLA, because the segmental motion of the PLA chains was reduced.
Rights: This is the author-created version of Springer, Shota Tomie, Naoya Tsugawa, and Masayuki Yamaguchi, Journal of Polymer Research, 25(9), 2018, Article:206. The original publication is available at www.springerlink.com, http://dx.doi.org/10.1007/s10965-018-1605-4
URI: http://hdl.handle.net/10119/16125
Material Type: author
Appears in Collections:c10-1. 雑誌掲載論文 (Journal Articles)

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