A NOVEL APPROACH FOR MEASURING THE SPECIFIC VOLUME OF (SEMI-CRYSTALLINE) POLYMERS AT ELEVATED COOLING RATES USING X-RAYS

摘要

A new method to determine the specific volume of polymers over a wide range of temperature and pressure based on X-ray attenuation was developed. This method allows the application of different cooling rates enabling the investigation of the density depending on the thermal history. Experiments were performed to investigate the devolution of the specific volume of an isotactic polypropylene at elevated pressures and cooling rates.