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Please use this identifier to cite or link to this item: http://hdl.handle.net/10119/15744

Title: Enhancement of glass transition temperature for poly(methyl methacrylate) by salt
Authors: Ito, Asae
Phulkerd, Panitha
Ayerdurai, Viknasvarri
Soga, Mizuki
Courtoux, Antoine
Miyagawa, Azusa
Yamaguchi, Masayuki
Keywords: PMMA
Tg
segmental motion
dynamic tensile modulus
oscillatory shear modulus
Issue Date: 2018-06-05
Publisher: Springer Nature
Magazine name: Polymer Journal
Volume: 50
Start page: 857
End page: 863
DOI: 10.1038/s41428-018-0080-4
Abstract: We investigated the effects of two metal salts, lithium trifluoromethanesulfonate (LiCF_3SO_3) and lithium bromide (LiBr), on the glass transition temperature (Tg) of poly(methyl methacrylate) (PMMA). Both LiCF_3SO_3 and LiBr greatly enhanced the T_g of PMMA under dry conditions. However, once the sample films were exposed to humidity, the PMMA containing LiCF_3SO_3 absorbed a large amount of water, which acts as a plasticizer. As a result, the T_g shifted to a lower temperature, which limits the utility of this polymer in industrial applications. In contrast, the T_g of PMMA containing LiBr was minimally affected by the absorption of water. This phenomenon can be explained by the ion–dipole interactions with the small number of dissociated lithium cations.
Rights: This is the author's version of the work. Copyright (C) 2018 The Society of Polymer Science. Asae Ito, Panitha Phulkerd, Viknasvarri Ayerdurai, Mizuki Soga, Antoine Courtoux, Azusa Miyagawa & Masayuki Yamaguchi, Polymer Journal, 50, 2018, 857-863. http://dx.doi.org/10.1038/s41428-018-0080-4
URI: http://hdl.handle.net/10119/15744
Material Type: author
Appears in Collections:c10-1. 雑誌掲載論文 (Journal Articles)

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