Molecular composites of poly(p-phenylene terephthalamide) anion and poly(ethylene oxide)

Thermal behavior and morphology

L. Tsou, J. A. Sauer, Masanori Hara

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Molecular composites, in which a small concentration of ionically modified poly(p-phenylene terephthalamide) (PPTA) is dispersed in a poly(ethylene oxide) matrix, have been prepared. With the content of PPTA anion increasing to about 5 wt%, the glass-transition temperature rises and the melting temperature decreases. From the equilibrium-melting-temperature depression data that were obtained from Hoffman-Weeks plots, the Flory-Huggins interaction parameter was determined to be negative (-1.10). These indications of enhanced miscibility between the components are attributed to intermolecular ion-dipole interactions. The presence of rigid PPTA-anion reinforcement alters the morphology; for example, the spherulite size is reduced, and the degree of crystallinity is lowered. Possible models of how the reinforcement is incorporated into the composite are presented.

Original languageEnglish (US)
Pages (from-to)1369-1376
Number of pages8
JournalJournal of Polymer Science, Part B: Polymer Physics
Volume38
Issue number10
DOIs
StatePublished - May 15 2000

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ethylene oxide
Polyethylene oxides
reinforcement
Anions
Melting point
Reinforcement
Negative ions
melting
anions
spherulites
composite materials
Composite materials
glass transition temperature
crystallinity
indication
solubility
Solubility
plots
interactions
Ions

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Materials Chemistry
  • Polymers and Plastics
  • Physical and Theoretical Chemistry

Cite this

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abstract = "Molecular composites, in which a small concentration of ionically modified poly(p-phenylene terephthalamide) (PPTA) is dispersed in a poly(ethylene oxide) matrix, have been prepared. With the content of PPTA anion increasing to about 5 wt{\%}, the glass-transition temperature rises and the melting temperature decreases. From the equilibrium-melting-temperature depression data that were obtained from Hoffman-Weeks plots, the Flory-Huggins interaction parameter was determined to be negative (-1.10). These indications of enhanced miscibility between the components are attributed to intermolecular ion-dipole interactions. The presence of rigid PPTA-anion reinforcement alters the morphology; for example, the spherulite size is reduced, and the degree of crystallinity is lowered. Possible models of how the reinforcement is incorporated into the composite are presented.",
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Molecular composites of poly(p-phenylene terephthalamide) anion and poly(ethylene oxide) : Thermal behavior and morphology. / Tsou, L.; Sauer, J. A.; Hara, Masanori.

In: Journal of Polymer Science, Part B: Polymer Physics, Vol. 38, No. 10, 15.05.2000, p. 1369-1376.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Molecular composites of poly(p-phenylene terephthalamide) anion and poly(ethylene oxide)

T2 - Thermal behavior and morphology

AU - Tsou, L.

AU - Sauer, J. A.

AU - Hara, Masanori

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AB - Molecular composites, in which a small concentration of ionically modified poly(p-phenylene terephthalamide) (PPTA) is dispersed in a poly(ethylene oxide) matrix, have been prepared. With the content of PPTA anion increasing to about 5 wt%, the glass-transition temperature rises and the melting temperature decreases. From the equilibrium-melting-temperature depression data that were obtained from Hoffman-Weeks plots, the Flory-Huggins interaction parameter was determined to be negative (-1.10). These indications of enhanced miscibility between the components are attributed to intermolecular ion-dipole interactions. The presence of rigid PPTA-anion reinforcement alters the morphology; for example, the spherulite size is reduced, and the degree of crystallinity is lowered. Possible models of how the reinforcement is incorporated into the composite are presented.

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