MECHANISMS OF PHYSICS -- CHEMICALS TRANSFORMATIONS IN THE POLYESTERS MIXTURES.

Purpose: Investigation of physical and chemical conversions and reactions in extrusion processing of polyester polymer blends. Methodology: Melt flow index, extensional and impact mechanical testing, reactive extrusion methods were used. Findings: For polymer blend PET with PC melt intermolecular reaction was carried out and changes in rheological and mechanical properties was investigated in accordance with reactions rate and experimental conditions. Influence of different type of additives for reaction rate was evaluated, activating and inhibiting action was find. Intermolecular reactions in the melt are confirmed by partial dissolution and changes in rheological properties of the blends with dependents to reaction time and temperature. During intermolecular reaction evidence of melt foaming was find after extend of some reaction time. Originality: The influence of different additive and process conditions on reaction rate was investigated. Practical Value: Practical aspects of polyester blend processing on extrusion equipment. [ABSTRACT FROM AUTHOR]