Molecular composites of poly(p-phenylene terephthalamide) anion and poly(propylene oxide): Mechanical properties

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

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

Molecular composites have been prepared by mixing rigid rod molecules of PPTA anion (K-salt) and poly(propylene oxide) in a common solvent and compression molding the precipitated material. As the PPTA anion content of the composites is increased, an upward shift occurs in both the glass transition temperature and the decomposition temperature. The tensile strength, stiffness and resistance to stress relaxation of the composites are significantly increased, even at relatively low concentrations of the rigid rod reinforcement. The enhancement in mechanical properties results from a good dispersion of the rigid PPTA anion molecules and from the presence of ion-dipole interactions between the ionic groups of the PPTA anion and the dipolar units of the poly(propylene oxide) matrix. Additional increases in strength and rigidity may be achieved by changing the counterion from monovalent K+ to divalent Ca2+. (C) 2000 Elsevier Science Ltd.

Original languageEnglish (US)
Pages (from-to)8103-8111
Number of pages9
JournalPolymer
Volume41
Issue number22
DOIs
StatePublished - Oct 2000

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

Keywords

  • Molecular composites
  • Poly(p-phenylene terephthalamide)
  • Poly(propylene oxide)

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