Linear viscoelastic and dielectric properties of phosphonium siloxane Ionomers

Quan Chen, Siwei Liang, Huai Suen Shiau, Ralph H. Colby

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

The linear viscoelastic (LVE) and dielectric relaxation spectroscopic (DRS) properties of polysiloxanes with phosphonium (fraction f) and oligo(ethylene oxide) (fraction 1 - f) side groups with a fraction of ionic monomers f = 0-0.26 have been studied. LVE master curves of those ionomers have been constructed. The ionic dissociation has been witnessed as a delayed polymer relaxation in LVE with increasing ion content, as well as an α2 ionic segmental relaxation process in DRS. LVE exhibits glassy and delayed rubbery relaxation at low ionic fraction f ≤ 11%, where the ionic dissociation time detected in DRS enables description of LVE with a sticky Rouse model. In contrast, the glassy and rubbery stress relaxation moduli merge into one broad process at high f ≥ 22%, where the whole LVE response from glassy to terminal relaxation can be described phenomenologically by a single Kohlrausch-Williams-Watts (KWW) equation with the lowest stretching exponent β = 0.10 ever seen for polymeric liquids, describing LVE over 15 decades of frequency.

Original languageEnglish (US)
Pages (from-to)970-974
Number of pages5
JournalACS Macro Letters
Volume2
Issue number11
DOIs
StatePublished - Dec 4 2013

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Siloxanes
Ionomers
Dielectric relaxation
Dielectric properties
Ethylene Oxide
Relaxation processes
Stress relaxation
Silicones
Stretching
Polymers
Ethylene
Monomers
Ions
Oxides
Liquids

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

Cite this

Chen, Quan ; Liang, Siwei ; Shiau, Huai Suen ; Colby, Ralph H. / Linear viscoelastic and dielectric properties of phosphonium siloxane Ionomers. In: ACS Macro Letters. 2013 ; Vol. 2, No. 11. pp. 970-974.
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abstract = "The linear viscoelastic (LVE) and dielectric relaxation spectroscopic (DRS) properties of polysiloxanes with phosphonium (fraction f) and oligo(ethylene oxide) (fraction 1 - f) side groups with a fraction of ionic monomers f = 0-0.26 have been studied. LVE master curves of those ionomers have been constructed. The ionic dissociation has been witnessed as a delayed polymer relaxation in LVE with increasing ion content, as well as an α2 ionic segmental relaxation process in DRS. LVE exhibits glassy and delayed rubbery relaxation at low ionic fraction f ≤ 11{\%}, where the ionic dissociation time detected in DRS enables description of LVE with a sticky Rouse model. In contrast, the glassy and rubbery stress relaxation moduli merge into one broad process at high f ≥ 22{\%}, where the whole LVE response from glassy to terminal relaxation can be described phenomenologically by a single Kohlrausch-Williams-Watts (KWW) equation with the lowest stretching exponent β = 0.10 ever seen for polymeric liquids, describing LVE over 15 decades of frequency.",
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Linear viscoelastic and dielectric properties of phosphonium siloxane Ionomers. / Chen, Quan; Liang, Siwei; Shiau, Huai Suen; Colby, Ralph H.

In: ACS Macro Letters, Vol. 2, No. 11, 04.12.2013, p. 970-974.

Research output: Contribution to journalArticle

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