Blends of poly(methyl methacrylate) (PMMA) with PMMA ionomers: Mechanical properties

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

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

Rigid-rigid blends made of ionomer and ionomer precursor polymer, based on poly(methyl methacrylate) (PMMA), have been investigated. Two series of blends have been prepared for studying mechanical properties. In one series, dynamic mechanical properties were determined over a wide range of temperatures. As the weight fraction of the ionomer was increased, there was a modest increase of modulus at ambient temperature and a very large increase in the rubbery modulus at elevated temperatures above the glass transition temperature of PMMA. In a second series of tests, tensile stress-strain measurements, made at an ambient temperature, were carried out over a wide range of blend compositions. For all blends tested, the mechanical properties exhibited a synergistic enhancement, i.e., average values of modulus, strength and fracture energy were all higher than expected based on the rule of mixtures. Measurements of fracture toughness also exhibited synergy, with a maximum value, higher than the value of either blend component, being attained in blends containing about 30 wt % of the PMMA ionomer. These results are interpreted in terms of a higher resistance to fracture of the more chain-entangled ionomer phase and good interfacial adhesion between the two components of the blend.

Original languageEnglish (US)
Pages (from-to)1235-1245
Number of pages11
JournalJournal of Polymer Science, Part B: Polymer Physics
Volume36
Issue number7
DOIs
StatePublished - May 1998

All Science Journal Classification (ASJC) codes

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

Keywords

  • Ionomer precursor polymer
  • Mechanical properties
  • PMMA

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