|Opis:||In this diploma thesis we studied the influence of acrylates, such as 1,6-hexanediol diacrylate, divinil adipate, ethylene glycol dimethacrylate, trimethylol propane triacrylate, on the formation of porous copolymer materials according to the principle of thiol-ene click polymerization, using high internal phase emulsions. We have been interested in how the structure of networks and porosity of the monoliths is changing, depending on the use of individual acrylates, and whether the emulsions are stable.
We prepared HIP emulsions in which we used different monomers, such as pentaerythritol tetrakis (3-mercatopropionate) and trimethylol propane tris (3-mercatopropionate) as a source of thiol, and the acrylic monomers with vinyl groups such as 1,6-hexanediol diacrylate, divinil adipate, ethylene glycol dimethacrylate and trimethylol propane triacrylate. During the preparation of the emulsions with a high internal phase we varied the volume of internal phase and studied how those changes affected the properties of the monoliths. Surfactant (Pluronic L121) and initiator (Irgacure 819) were the same in the case of all emulsions; the same were also the conditions of photo polymerisation and the mixing rate of the emulsion. The results were stable emulsions, which after photo polymerization, in all cases did not form a typical polyHIPE structures. Using line electron microscopy we studied the morphology of the samples, and in some cases we observed the phenomenon of phase inversion. The materials were also analysed using FTIR spectroscopy and elemental analysis, to study the chemical composition, because we were interested in the sulphur content in the sample. The analysis showed us that there are no significant deviations between the theoretical values and the values obtained from the analysis. We also analysed the porosity by determining specific surface by the BET method and with the use of mass balance, we calculated the yield of polymerization. We were interested in why phase inversion occurred, and why, despite stable emulsions and successful polymerization, we did not get a typical polyHIPE structures.|