Evolution of the long period of oriented polypropylene film in the temperature interval 25 – 150 °C
The use of the Empyrean diffractometer in combination with the Anton Paar MHC-trans chamber enables us to characterize changes in the long period of α-polypropylene lamellae in the temperature range from 25 ºC to 150 ºC, using in situ SAXS.
One of the main parameters characterizing a lamellae stack is the distance between two crystalline layers (the long period). Generally the long period is in the order of tens of nanometers and therefore can be easily measured using small angle X-ray scattering (SAXS). Here we present an in situ study of the long period of α-polypropylene as a function of temperature.