20.500.12556/DKUM-99953 RAFT polimerizacija glicidil metakrilata: vpliv na morfologijo in funkcionalizacijo površine Raft polymerization of glycidyl methacrylate: effects on morphology and surface functionalization V diplomskem delu smo pripravili visoko porozne poliHIPE materiale na osnovi glicidil metakrilata (GMA) z uporabo proste radikalske in RAFT polimerizacije ter raziskali vpliv vrste polimerizacije na morfologijo in možnosti nadaljnje kemijske modifikacije materialov. Sintetizirali smo poli(GMA-ko-MMA-ko-EGDMA) polimere s polimerizacijo kontinuirne faze emulzij z visokim deležem notranje faze (80 vol.%) pri različnih stopnjah zamreženosti (5 do 30 mol% EGDMA) ter pri različnih molskih razmerjih med monomeri in RAFT reagentom. Pripravljene materiale smo okarakterizirali z vrstično elektronsko mikroskopijo (SEM), FT-IR spektroskopijo, elementno analizo in gravimetrijo. SEM analize so pokazale, da uporaba RAFT polimerizacije vpliva na razvoj porozne strukture materialov. V večini primerov so materiali, pripravljeni z RAFT polimerizacijo, izkazovali manjše in bolj homogeno porazdeljene pore, ter bolj definirano odprtocelično morfologijo v primerjavi z materiali, sintetiziranimi s prosto radikalsko polimerizacijo. FT-IR analiza je potrdila uspešno sintezo poli(GMA-ko-MMA-ko-EGDMA) materialov ter ohranitev epoksidnih skupin GMA po polimerizaciji, kar je omogočilo njihovo nadaljnjo funkcionalizacijo. Sintetizirane materiale smo funkcionalizirali s tris(2-aminoetil)aminom. Uspešnost funkcionalizacije smo potrdili s FT-IR spektroskopijo in elementno analizo, ki je pokazala prisotnost dušika v vseh funkcionaliziranih vzorcih. Pri vseh vzorcih, pripravljenih z RAFT polimerizacijo, smo določili višjo stopnjo funkcionalizacije kot pri vzorcih, sintetiziranih s prosto radikalsko polimerizacijo, kar nakazuje na boljšo dostopnost epoksidnih skupin za nadaljnje kemijske reakcije. Najuspešnejša funkcionalizacija je bila dosežena pri vzorcu, pripravljenem z RAFT polimerizacijo, kjer je izmerjena vsebnost dušika znašala 12,52 mas.%, kar ustreza približno 81 % konverziji epoksidnih skupin. Na površini RAFT poliHIPE materialov smo izvedli graftiranje monomera HEMA. Pri tem so RAFT končne skupine delovale kot aktivna mesta za nadaljnjo polimerizacijo, kar je omogočilo rast poliHEMA verig iz površine polimera. Gravimetrija, FT-IR spektroskopija in elementna analiza so pokazale, da je bilo graftiranje uspešno predvsem pri vzorcih z nižjo stopnjo zamreženosti. Dobljeni rezultati potrjujejo, da RAFT polimerizacija omogoča pripravo visoko poroznih poli(GMA-ko-MMA-ko-EGDMA) materialov, ki so primerni za nadaljnjo površinsko funkcionalizacijo in razvoj naprednih funkcionalnih polimernih materialov. In this thesis, highly porous polyHIPE materials based on glycidyl methacrylate (GMA) were prepared using free-radical and RAFT polymerisation, and the influence of the polymerisation method on the morphology and possibilities for further chemical modification of the materials was investigated. Poly(GMA-co-MMA-co-EGDMA) polymers were synthesized by polymerising the continuous phase of high internal phase emulsions (HIPEs) with an internal phase volume fraction of 80 vol.% at different degrees of crosslinking (5 to 30 mol% EGDMA) and at different molar ratios of the monomers to the RAFT agent. The prepared materials were characterized by scanning electron microscopy (SEM), FT-IR spectroscopy, elemental analysis, and gravimetry. SEM analyses showed that the use of RAFT polymerisation affects the development of the porous structure of the materials. In most cases, materials prepared by RAFT polymerisation exhibited smaller and more homogeneously distributed pores, as well as a more clearly defined open-cell morphology compared to materials synthesized by free-radical polymerisation. FT- IR analysis confirmed the successful synthesis of the poly(GMA-co-MMA-co-EGDMA) materials and the retention of the epoxy groups of GMA after polymerisation, which enabled their further functionalization. The synthesized materials were functionalized with tris(2-aminoethyl)amine. The successful functionalization was confirmed by FT-IR spectroscopy and elemental analysis, which demonstrated the presence of nitrogen in all functionalized samples. All samples prepared by RAFT polymerisation exhibited a higher degree of functionalization than those synthesized by free-radical polymerisation, indicating greater accessibility of the epoxy groups for subsequent chemical reactions. The highest degree of functionalization was achieved for the sample prepared by RAFT polymerisation, for which the measured nitrogen content was 12.52 wt.%, corresponding to approximately 80 % conversion of the epoxy groups. Grafting of the HEMA monomer was performed on the surface of the RAFT polyHIPE materials. In this process, the RAFT end groups acted as active sites for subsequent polymerisation, enabling the growth of polyHEMA chains from the polymer surface. Gravimetric measurements, FT-IR spectroscopy, and elemental analysis demonstrated that grafting was particularly successful for samples with a lower degree of crosslinking. The obtained results confirm that RAFT polymerisation enables the preparation of highly porous poly(GMA-co-MMA-co-EGDMA) materials suitable for further surface functionalization and the development of advanced functional polymeric materials. RAFT polimerizacija graftiranje poliHIPE glicidil metakrilat funkcionalizacija RAFT polymerisation grafting polyHIPE glycidyl methacrylate functionalization true true false Slovenski jezik Angleški jezik Diplomsko delo/naloga 2026-08-31 17:16:56 2026-09-17 11:30:46 2026-09-18 03:09:56 0000-00-00 00:00:00 2026 0 Maribor 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 UN_Ursic_Lara_2026.pdf UN_Ursic_Lara_2026.pdf 1 FFEBDEFF7D99415468FEA914E5BF35CA 09c7ad8009da7dfe8a271cb365c2e3b164df455437a4ca593557518f570ae19c 8d1bdcba-b1e3-11f1-b05b-00155d0001be https://dk.um.si/Dokument.php?lang=slv&id=212671 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0