Creep of Polymethyl Methacrylate at Low Temperature

Abstract

In order to supplement the dynamical investigation of the secondary absorption region of polymethyl methacrylate, which appeared at 20°C in \frac12 cps vibration measurement as described in the previous report, the torsional creep was observed at various temperatures from −50°C to 30°C. Assuming that this polymer is “thermorheologically simple”, the master creep curve was constructed, and the activation energy of 30 kcal/mol was obtained.