Rheology of SiO2/(Acrylic Polymer/Epoxy) Suspensions. II. Nonlinear Stress Relaxation

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Author: UEMATSU, Hideyukiほか

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Publication date: 2010

Material Format: Digital

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Note (General)：: Large deformation, nonlinear stress relaxation modulus G(t,) was examined for the SiO2 suspensions in a blend of acrylic polymer (AP) and epoxy (EP) ...

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Material Type: 文書・図像類
Title: Rheology of SiO2/(Acrylic Polymer/Epoxy) Suspensions. II. Nonlinear Stress Relaxation
Author/Editor: UEMATSU, Hideyuki
AOKI, Yuji
SUGIMOTO, Masataka
KOYAMA, Kiyohito
Author Heading: UEMATSU, Hideyuki
AOKI, Yuji
SUGIMOTO, Masataka
KOYAMA, Kiyohito
Publication Date: 2010
Publication Date (W3CDTF): 2010
Periodical title: Rheologica Acta
No. or year of volume/issue: 49
Volume: 49
Pages: 1187-1196
Text Language Code: eng
Subject Heading: Nonlinear stress relaxation
Time-strain separability
Sol-gel transition
Critical gel point
Critical exponent
SiO2 suspension
Target Audience: 一般
Note (General): Large deformation, nonlinear stress relaxation modulus G(t,) was examined for the SiO2 suspensions in a blend of acrylic polymer (AP) and epoxy (EP) with various SiO2 volume fractions () at various temperatures (T). The AP/EP contained 70 vol% of EP. At   30 vol%, the SiO2/(AP/EP) suspensions behaved as a viscoelastic liquid, and the time-strain separability, G(t,)  G(t)h(), was applicable at long time. The h() of the suspensions was more strongly dependent on  than that of the matrix (AP/EP). At  = 35 vol% and T = 100oC, and   40 vol%, the time-strain separability was not applicable. The suspensions exhibited a critical gel behavior at  = 35 vol% and T = 100C characterized with a power-law relationship between G(t) and t; G(t)  tn. The relaxation exponent n was estimated to be about 0.45, which was in good agreement with the result of linear dynamic viscoelasticity reported previously. G(t,) also could be approximately expressed by the relation G(t,)  tn at   40 vol%. The exponent n increased with increasing . This nonlinear stress relaxation behavior is attributable to strain-induced disruption of the network structure formed by the SiO2 particles therein.
Access Restrictions: 限定公開
Data Provider (Database): 国立情報学研究所 : 学術機関リポジトリデータベース（IRDB）（機関リポジトリ）
https://irdb.nii.ac.jp
Original Data Provider (Database): 福井大学 : 福井大学学術機関リポジトリ