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Erschienen in: Rheologica Acta 5-6/2011

01.06.2011 | Original Contribution

Rheology of SiO 2 /(acrylic polymer/epoxy) suspensions. III. Uniaxial elongational viscosity

verfasst von: Hideyuki Uematsu, Yuji Aoki, Masataka Sugimoto, Kiyohito Koyama

Erschienen in: Rheologica Acta | Ausgabe 5-6/2011

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Abstract

Uniaxial elongational viscosity of SiO2/(acrylic polymer/epoxy (AP/EP)) suspensions with various SiO2 volume fractions (ϕ) in a blend of acrylic polymer and epoxy was investigated at various temperatures (T). The matrix polymer ((AP/EP) blend) contained 70 vol.% of EP. At ϕ ≤ 35 vol.% at T ≤ 80°C, where the suspensions were in sol state, strain-hardening behavior was observed. This strain hardening of the suspensions is attributable to the elongational flow properties of (AP/EP) medium. At critical gel state (ϕ = 35 vol.% and T = 100°C) and in gel state (ϕ ≥ 40 vol.%), the elongational viscosity exhibited the strain-softening behavior. These results strongly suggest that the strain softening results from the strain-induced disruption of the network structure of the SiO2 particles therein.

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Metadaten
Titel
Rheology of SiO 2 /(acrylic polymer/epoxy) suspensions. III. Uniaxial elongational viscosity
verfasst von
Hideyuki Uematsu
Yuji Aoki
Masataka Sugimoto
Kiyohito Koyama
Publikationsdatum
01.06.2011
Verlag
Springer-Verlag
Erschienen in
Rheologica Acta / Ausgabe 5-6/2011
Print ISSN: 0035-4511
Elektronische ISSN: 1435-1528
DOI
https://doi.org/10.1007/s00397-010-0509-y

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