Specific volume of P/E random copolymers

Methods A fully automated custom designed dilatometer was used in this study. The experimental procedure used was as follows: The samples in the experiment were molten at the thermodynamical melting point and kept at this temperature for 10 minutes to erase the memory of their former structure. Next, the samples were pressurized and subsequently cooled. A unique feature of this dilatometer is the optional application of a defined shear step (total shear and shear rate were set) at a set temperature during the cooling period. In this way the influence of flow during processing can be studied in a systematic way.