The mechanical spectra of glycerol measured by a composite reed vibration method

摘要

We extend an experimental procedure to measure the complex Young's modulus of glycerol from liquid to glassy state, a composite reed vibration method. In this report, a rigorous analysis is obtained to subtract the mechanical spectrum of deposited materials from a composite system consisting of the substrate reed and of materials deposited on it. The dynamic glass transition of glycerol was measured by the mechanical spectra method at two frequencies in the same heating route. The consistency with the mechanical spectrum available in the literature shows the composite reed vibration method to be reliable and effective.