Evaluation of the Water Sorption Capacity of Some Polymeric Materials by Dynamic Vapour Sorption

Water sorption/desorption behaviour of the materials is very relevant for their application in pharmaceutical, food, sensor, electronics, fuel cell and biomedical fields. The sorption/desorption equilibrium, which is related with the plasticity and mechanical properties of the materials, as well as the kinetics of water sorption/ desorption, which is related to the transport properties, are interesting research areas. The fully automated gravimetric analyzer is an equipment for rapid evaluation of the moisture sorption capacity in dynamic regime. The ultrasensitive microbalance measures the weight modification as the humidity is changed in the sample chamber at constant regulated temperature. Water vapour sorption behaviour of some materials belonging to different polymeric classes with various structures and morphologies were investigated.