Segmental Dynamics of Ethylene Oxide-Containing Polymers with Diverse Backbone Chemistries

Joshua Bartels, Jing Han Helen Wang, Quan Chen, James Patrick Runt, Ralph H. Colby

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The dielectric response of seven nonionic ethylene oxide-containing polymers are investigated. Four different backbone chemistries are considered, including polymethacrylate, polyester ether, polyphosphazene, and polysiloxane. The chemistry of the backbone and the linking chemistry to incorporate ether oxygen (EO) groups dramatically affect polymer segmental dynamics. The Tg of the inorganic backbone polymers is ∼15 °C lower than that of the PEO homopolymer. Polysiloxanes exhibit the lowest Tg of -86 °C when attached with pendent -(CH2-CH2-O)4-CH3 groups. The strength of the alpha relaxation is the same for the hydrocarbon backbone polymers (Δε = 10), whereas the dielectric constants of inorganic polymers with short pendent groups is lower (Δε = 3). The difference in relaxation strengths is due to restricted motion of ether oxygens close to the backbone. This effect diminishes as the relative backbone concentration is decreased by increasing the pendent EO length. As pendent EO chain length is increased, the segmental relaxation broadens due to ether oxygens experiencing different local environments.

Original languageEnglish (US)
Pages (from-to)1903-1910
Number of pages8
JournalMacromolecules
Volume49
Issue number5
DOIs
StatePublished - Mar 9 2016

Fingerprint

Ethylene Oxide
Ether
Ethers
Polymers
Ethylene
Oxides
Oxygen
Siloxanes
Inorganic polymers
Silicones
Polyesters
Hydrocarbons
Polyethylene oxides
Homopolymerization
Chain length
Permittivity

All Science Journal Classification (ASJC) codes

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

Cite this

Bartels, Joshua ; Wang, Jing Han Helen ; Chen, Quan ; Runt, James Patrick ; Colby, Ralph H. / Segmental Dynamics of Ethylene Oxide-Containing Polymers with Diverse Backbone Chemistries. In: Macromolecules. 2016 ; Vol. 49, No. 5. pp. 1903-1910.
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Segmental Dynamics of Ethylene Oxide-Containing Polymers with Diverse Backbone Chemistries. / Bartels, Joshua; Wang, Jing Han Helen; Chen, Quan; Runt, James Patrick; Colby, Ralph H.

In: Macromolecules, Vol. 49, No. 5, 09.03.2016, p. 1903-1910.

Research output: Contribution to journalArticle

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