Abstract
An instrument has been developed for monitoring cure processes under microwave heating conditions. The main function of the instrument was a calorimeter for performing microwave thermal analysis. A single model resonant cavity was used as the heating cell in the microwave calorimeter.
Thermal analysis measurements were obtained by monitoring the variation in the microwave power that was required to maintain controlled heating of the sample. The microwave thermal analysis data were analogous to conventional differential scanning calorimetry measurements. The dielectric properties of the sample, as a function of the extent of cure, have been obtained using perturbation theory from the changes in resonant frequency and quality factor of the microwave cavity during heating. Additionally, remote sensing fibre-optic probes have been employed to measure real time in situ infrared spectra of the sample during the cure reaction. In this paper, we describe the design and operation of the microwave calorimeter. Examples of experimental results are also presented.
Disciplines
Aerospace Engineering | Analytical Chemistry | Chemical Engineering | Chemistry | Condensed Matter Physics | Engineering | Engineering Science and Materials | Heat Transfer, Combustion | Materials Chemistry | Organic Chemistry | Physical Chemistry | Physics | Polymer and Organic Materials | Polymer Chemistry | Polymer Science | Process Control and Systems | Structures and Materials
Recommended Citation
Nesbitt, A., Navabpour, P., Degamber, P. Nightingale, C. Mann, T., Fernando, G. and Day R.J. (2004) ‘Development of a microwave calorimeter for simultaneous thermal analysis, infrared spectroscopy and dielectric measurements’, Measurement Science and Technology Vol. 15, No. 11, pp. 2313–2324
Digital Commons Citation
Nesbitt, A., Navabpour, P., Degamber, P. Nightingale, C. Mann, T., Fernando, G. and Day R.J. (2004) ‘Development of a microwave calorimeter for simultaneous thermal analysis, infrared spectroscopy and dielectric measurements’, Measurement Science and Technology Vol. 15, No. 11, pp. 2313–2324
Included in
Analytical Chemistry Commons, Condensed Matter Physics Commons, Engineering Science and Materials Commons, Heat Transfer, Combustion Commons, Materials Chemistry Commons, Organic Chemistry Commons, Physical Chemistry Commons, Polymer and Organic Materials Commons, Polymer Chemistry Commons, Polymer Science Commons, Process Control and Systems Commons, Structures and Materials Commons
Comments
Copyright © Institute Of Physics 2004. This is the authors final version and the full published version is available at http://dx.doi.org/10.1088/0957-0233/15/11/018 and via the publishers link at http://iopscience.iop.org/0957-0233/15/11/018