Unfrustration of a frustrated liquid crystalline polymer

Hua Sun, Katherine V. Heifferon, Hossein Ghassemi, Timothy Edward Long, David A. Schiraldi

Research output: Contribution to journalArticle

Abstract

4,4′-biphenyl dicarboxylate modified poly(ethylene terephthalate) (PET) copolyester molecules proximate to glass fiber surfaces in composites are shown to self-order into a liquid crystalline state. Near the glass fiber surfaces, the polymer chains are proposed to align and form more ordered domains increasing translational entropy, which leads to an overall increase in entropy of the system. The frustrated liquid crystalline polymer of this study, when confined near glass fiber surfaces, became more easily ordered, an example of the concept know as “order through entropy”. Solid-phase birefringence, lower molten-phase viscosity and storage modulus were observed and discussed as properties of these new systems. Such glass fiber reinforced PETBB55 composites possess enhanced mechanical and processing properties, a unique combination.

Original languageEnglish
Pages (from-to)59-64
Number of pages6
JournalPolymer
Volume158
DOIs
Publication statusPublished - 2018 Dec 5
Externally publishedYes

Fingerprint

Liquid crystal polymers
Glass fibers
Entropy
Polyethylene Terephthalates
Composite materials
Birefringence
Polyethylene terephthalates
Molten materials
Polymers
Elastic moduli
Viscosity
Crystalline materials
Molecules
fiberglass
Liquids
Processing

Keywords

  • Bibenzoate
  • Glass fiber
  • Liquid crystal

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

Cite this

Sun, H., Heifferon, K. V., Ghassemi, H., Long, T. E., & Schiraldi, D. A. (2018). Unfrustration of a frustrated liquid crystalline polymer. Polymer, 158, 59-64. https://doi.org/10.1016/j.polymer.2018.10.052

Unfrustration of a frustrated liquid crystalline polymer. / Sun, Hua; Heifferon, Katherine V.; Ghassemi, Hossein; Long, Timothy Edward; Schiraldi, David A.

In: Polymer, Vol. 158, 05.12.2018, p. 59-64.

Research output: Contribution to journalArticle

Sun, H, Heifferon, KV, Ghassemi, H, Long, TE & Schiraldi, DA 2018, 'Unfrustration of a frustrated liquid crystalline polymer', Polymer, vol. 158, pp. 59-64. https://doi.org/10.1016/j.polymer.2018.10.052
Sun H, Heifferon KV, Ghassemi H, Long TE, Schiraldi DA. Unfrustration of a frustrated liquid crystalline polymer. Polymer. 2018 Dec 5;158:59-64. https://doi.org/10.1016/j.polymer.2018.10.052
Sun, Hua ; Heifferon, Katherine V. ; Ghassemi, Hossein ; Long, Timothy Edward ; Schiraldi, David A. / Unfrustration of a frustrated liquid crystalline polymer. In: Polymer. 2018 ; Vol. 158. pp. 59-64.
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