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Please use this identifier to cite or link to this item: http://hdl.handle.net/10119/16120

Title: Effect of Molecular Size on the Correlated Dynamics of Low-Mass Molecule and Local Chain Motion in Antiplasticized Polycarbonate
Authors: Maeda, Mai
Nobukawa, Shogo
Inomata, Katsuhiro
Yamaguchi, Masayuki
Keywords: antiplasticization
molecular dynamics
dielectric relaxation
mechanical relaxation
Issue Date: 2019-06-14
Publisher: 日本レオロジー学会
Magazine name: 日本レオロジー学会誌 (Journal of the Society of Rheology, Japan)
Volume: 47
Number: 3
Start page: 111
End page: 117
DOI: 10.1678/rheology.47.111
Abstract: We have investigated the relation between the polymer and low-mass molecule (LM) dynamics in antiplasticized polycarbonate (PC). Antiplasticization results in enhancement of the Young’s modulus of polymeric materials by adding LMs. Comparison of the dynamic mechanical properties and dielectric relaxation behavior suggests that the LMs are immobile below room temperature (~ 25 ºC) and mobile above room temperature. The LM dynamics shows a similar trend to the local chain motion of PC, indicating the dynamical relation between the two components. Additionally, we investigated the effect of the LM size on antiplasticization and the local chain motion of PC by using alkyl cyano-biphenyl with various carbon numbers and 4-pentyl-4′-cyanoterphenyl. The LM size does not affect the degree of modulus enhancement of PC at the room temperature. However, mechanical relaxation of the local chain motion of PC shows wider temperature dependence for shorter LM size. The activation energy of molecular motion decreases with decreasing LM size, indicating that restriction of the local chain motion of PC and the LMs becomes weaker for smaller LM size.
Rights: 本著作物は日本レオロジー学会の許可のもとに掲載するものです。This material is posted here with permission of the Society of Rheology, Japan. Copyright (C) 2019 日本レオロジー学会. Mai Maeda, Shogo Nobukawa, Katsuhiro Inomata, Masayuki Yamaguchi, 日本レオロジー学会誌 (Journal of the Society of Rheology, Japan), 47(3), 2019, 111-117. http://dx.doi.org/10.1678/rheology.47.111
URI: http://hdl.handle.net/10119/16120
Material Type: publisher
Appears in Collections:c10-1. 雑誌掲載論文 (Journal Articles)

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