Abstract
The authors developed a new approximation algorithm for the construction of a master curve of viscoelastic property with Prony series in high accuracy based on the well-known collocation method. The algorithm enables automatic construction of an approximated master curve for thermosets or thermoplastics irrespectively, with no special experiences in the field and no violation of physical meanings by approximation in which the former algorithm could not avoid oscillation caused by changing. In order to demonstrate the effectiveness of the algorithm, the authors measured a viscoelastic property using a dynamic viscoelastic tester made by Rheometrics Inc. and utilized the data for a Prony series function. In addition, some master curve data of Epoxy resin and Polyisobutylene quoted from references were examined. As a result, the approximated curve fit to experimental data well keeping the sign of coefficient in plus.
