شماره ركورد كنفرانس :
4561
عنوان مقاله :
Thermo-Mechanical Characterization of High Impact Polystyrene Sheets Using Uniaxial Stress Relaxation Tests
Author/Authors :
M Ghobadnam Polymer and Glass Processing Laboratory - Department of Mechanical Engineering - Isfahan University of Technology, Isfahan , P Mosaddegh Polymer and Glass Processing Laboratory - Department of Mechanical Engineering - Isfahan University of Technology, Isfahan , N Namdari Polymer and Glass Processing Laboratory - Department of Mechanical Engineering - Isfahan University of Technology, Isfahan , M Masoomi Polymer and Glass Processing Laboratory - Department of Mechanical Engineering - Isfahan University of Technology, Isfahan , A Ghaei Polymer and Glass Processing Laboratory - Department of Mechanical Engineering - Isfahan University of Technology, Isfahan
كليدواژه :
Thermo-mechanical , High impact polystyrene , Uniaxial stress relaxation test , Glass transition temperature
عنوان كنفرانس :
The Bi-Annual International Conference on Experimental Solid Mechanics and Dynamics ۲۰۱۴
چكيده لاتين :
In the present study thermo-mechanical properties of high impact polystyrene (HIPS) polymer sheets near its glass transition temperature have been investigated. Its behavior is determined by using uniaxial stress relaxation tests. The tests are performed in both extrusion and transverse directions of the sheets at various temperatures and initial strain magnitudes. By dividing the time dependent relaxation modulus to the initial relaxation modulus, the time dependent stress relaxation modulus is normalized with respect to initial strain. The experimental observations showed that the stress relaxation behavior of HIPS is dependent on the initial strain magnitude and temperature. Moreover, it is found that the properties of HIPS are different at material extrusion and transverse directions such that the material stores more strain energy at transverse direction.
