Time and temperature dependence of the mechanical properties of polystyrene bead foam

✍ Scribed by J. A. Rinde; K. G. Hoge

• Publisher: John Wiley and Sons
• Year: 1971
• Tongue: English
• Weight: 890 KB
• Volume: 15
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.1971.070150608

✦ Synopsis

Abstract

Tensile and compressive properties of polystyrene bead (PSB) foams at room temperature for strain rates from 10^−3^ to 10^5^ min^−1^ can be represented as nearly linearly increasing functions of modulus or stress versus the logarithm of the strain rate. The shear modulus and tensile data, including failure properties, on 0.054 g/cc PSB foam at various temperatures and strain rates can be represented by master curves of log (stress or modulus) versus log (reduced strain rate). These master curves are formed by a time and temperature superposition method, wherein data at one temperature are superposed on data at another temperature by a shift along the log (strain rate) axis. These time–temperature shift factors are calculated using a form of the Arrhenius equation.