Journal of Materials Science

, Volume 29, Issue 4, pp 870–876 | Cite as

The mechanical properties of PMMA and its copolymers with ethyl methacrylate and butyl methacrylate

  • J. A. Johnson
  • D. W. Jones


The mechanical properties of polymethyl methacrylate and copolymers formed with both ethyl methacrylate and butyl methacrylate were investigated. Six polymers were produced by bulk polymerization, measured for molecular weight and glass transition temperature, Tgand assessed for modulus of elasticity and fracture toughness. Increasing the concentration of ethyl methacrylate or butyl methacrylate resulted in a linear decrease in the glass transition temperature, modulus of elasticity, and fracture toughness. A comparison of testing environments revealed that the modulus of elasticity was reduced when conditioned and tested in water at 37 °C compared to ambient laboratory conditions for all polymers. Similar comparisons of the fracture toughness showed an increase for testing in water at 37 °C; however, this was not significant for the lower Tgcompositions. Both modulus of elasticity and fracture toughness were strongly correlated with the glass transition temperature and composition.


Polymer Molecular Weight Mechanical Property Fracture Toughness PMMA 
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Copyright information

© Chapman & Hall 1994

Authors and Affiliations

  • J. A. Johnson
    • 1
    • 2
  • D. W. Jones
    • 1
    • 2
    • 3
  1. 1.Department of SurgeryDalhousie UniversityHalifaxCanada
  2. 2.Department of Mechanical EngineeringTechnical University of Nova ScotiaHalifaxCanada
  3. 3.Division of Biomaterials Science, Faculty of DentistryDalhousie UniversityHalifaxCanada

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