|Opis:||In this dissertation, we prepared porous materials on the basis of poly(glycidyl methacrylate), with multilevel porosity. This porosity was achived by method of sintering poly(methyl methacrylate) (PMMA) beads. These sintered beads served as supports, over which we poured high internal phase emulsion (HIPE) and polymerized continuous phase of the emulsion. After the polymerization, PMMA beads were removed in the Soxhlet apparatus in order to get porous material.
Firstly, we sintered our supports. PMMA beads were sintered at two different temperatures, 180 °C and 200 °C, for different amounts of time: 1h, 2h, 5h, 24h and 48h. That way, we prepared supports that differentiated in amounts of interconnections and necks between beads.
Then we prepared high internal phase emulsion, type water-in-oil, with GMA and 10% EGDMA. The emulsion was separated on two parts: half of the emulsion was polymerized thermally in the oven and the other half was poured over differently sintered PMMA supports, and then polymerized thermally in the oven. After the polymerization, PMMA beads were removed from the obtained products by extraction using hot ethyl acetate in a Soxhlet apparatus, thus resulting in porous material. Final products were then characterized with a scanning electron microscope (SEM).
All of the prepared materials showed open cell structure and multilevel porosity. Primary pores were interconnected with smaller, connective or secondary pores. Primary pores took the place of PMMA beads, which were removed by the process of cleaning, while connective pores were formed at the contact points of the sintered beads. The framework of the materials showed porous structure, the so-called tertiary pores, which corresponded to the porosity of poly(GMA-co-EGDMA) material.|