Some Considerations Concerning the Differential Scanning Calorimetry of Ultra Tough Plastic Materials

Abstract

The Differential Scanning Calorimetry (DSC) it’s an important analysis in research since the 20th century, being used is various fields such as: physics, chemistry, science and materials technology. Its applicability has also extended to other fields, such as nanothermodynamics and bio-thermodynamics. Calorimetry measures the amount of heat absorbed/dissipated by a test sample as compared to a reference value, when the test sample is subjected to a heating and/or cooling cycle. The calorimetric effect may be revealed by the temperature-and/or time-dependent heat flow variation, and its evaluation makes sense when particular heat flow variations, specific to the various transformations accompanying temperature variation, occur. The research described in this paper focuses on the study of calorimetry of ultra tough plastic materials such B4300G4 and B4300G6. The samples were obtained by injection moulding and the planning of the experiments was achieved by means of the Taguchi methodology. The differential scanning calorimetry will show the endothermal and exothermal transformations during which we measured the transformation onset and completion temperatures, as well as the temperature in the middle of the transformation process. Also will be measured the amount of absorbed and dissipated heat, respectively. The DSC diagram showed no temperature-dependent heat flow variation that could suggest a solid state transformation. This paper aims to highlight the behavior of glass transition using DSC analysis, the transformation that occurs during heating of the two polymers obtained using three injection angles: 0o, 45o and 90o.