Biodegraduojančių vaistų nešėjų sąveika su hidrofiline terpe

The aim of this thesis “Interactions of biodegradable drug carriers with hydrophilic medium” is the study of polymer-hydrophilic medium interactions from the point of view of swelling, erosion and glass transition. In the theoretical part attention was paid to basic information about polyester amides and polyesters with molecule linear, branched, and chain extended. In this part, some basic relations were used, concerning various aspects of biodegradation of polymers, thermal analysis of amorphous phase of polymers and pharmaceutical particulate systems. The main part of the thesis is focused on experiment. Fifteen recently synthesized oligomeric and polymeric carriers were studied in the aspect of their swelling and erosion course. Some of these oligoesters with molecular linear constitution were evaluated during in vitro degradation process via glass transition tested by DSC method measurements. No correlation signs between swelling kinetics and glass transition temperature values course were found. These two molecular relaxation parameters are the manifestations of different mechanism. Swelling extent is influenced by osmotic phenomena, whilst glass transitions by molecule polarization effects. This work is one of the first steps examining these drug carriers. The results of this work will be used in choosing perspective drug carriers and in further researches