Oxygen and water vapour permeability are two important characteristics of polymer films. They are regularly tested. Alternative testing methods help to make their determination more efficient. Two alternative methods are presented. Oxygen sensors based on dynamic quenching of luminescence by molecular oxygen are increasingly applied to measure oxygen permeability. The development progressed in recent years resulting in more sensitive sensors. They are suitable to measure the oxygen permeability of films in the range of-.05 to 2000 cm~3-(m~2-d-bar)~(-1).
展开▼
