Characterization of molecular orientation by differential scanning calorimetry
- 29 Downloads
Differential scanning calorimetry was used to study part quality from an injection blow moulding machine producing polystyrene thin-walled containers. Cavity-to-cavity, within cavity and shot-to-shot problems were detected. Multiple relaxation peaks observed in the temperature range Tg-TLL had the relationship Tj=1.02 Ti K, for TLL⩾Tj> Ti⩾ Tg and (j−i)=1. Based on some simple assumptions, a model was developed that allowed the multiple peaks be resolved between the injection moulding and blowing steps of the process and into a three-dimensional array.
KeywordsPolymer Differential Scanning Calorimetry Polystyrene Calorimetry Molecular Orientation
Unable to display preview. Download preview PDF.