Abstract
The uniaxial tensile creep of a commercial grade poly(methyl methacrylate)(PMMA) was measured for 4000 s at 26 ℃ and at stress levels ranging from 14 MPa to 32 MPa. Considering the influence of physical aging and rheological damage factors on the long-term creep properties of polymers, another time-temperature-stress superposition principle expression was derived. This expression as used to predict the long-term creep mechanical behaviour of PMMA. It was found that a long-term creep compliance master curve considering physical aging and damage agrees well with actual long-term creep test results.
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