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Investigation Of The Optical, Thermal, And Mechanical Properties Of A Bulk Polymer Using The Surface Thermal Lensing Technique, Bushra Hussain
Investigation Of The Optical, Thermal, And Mechanical Properties Of A Bulk Polymer Using The Surface Thermal Lensing Technique, Bushra Hussain
Master's Theses and Doctoral Dissertations
The sensitive and simple photothermal technique of Surface Thermal Lensing (STL) was employed to study the thermo-mechanical response of an amorphous polycarbonate as a bulk. A discussion is given of how previously developed theories did not fit well with the present work. Therefore, only qualitative analysis and discussion of the experimental results is made, emphasizing the influence of various factors on the STL signal. The work here is mainly a study of the dependence of the STL signal on the modulated pump beam frequency. The effect on the STL signal of thermal and mechanical relaxation in the thermally stimulated area …