20.500.12556/DKUM-100015 Raft polimerizacija akrilatov brez iniciatorja Initiator-Free raft polymerization of acrylates V okviru diplomskega dela smo proučevali možnost sinteze poli(met)akrilatov z UV-inducirano RAFT polimerizacijo brez uporabe klasičnega fotoiniciatorja. Namesto fotoiniciatorja smo uporabili svetlobno občutljiv RAFT reagent, 2-(dodeciltiokarbonotioiltio)-2-metilpropanojsko kislino (DDMAT), ki je ob UV obsevanju deloval kot vir radikalov in hkrati kot RAFT reagent. Polimere smo sintetizirali s polimerizacijo v masi in s polimerizacijo monomerne faze emulzij z visokim deležem notranje faze (poliHIPE). Pripravili smo materiale na osnovi glicidil metakrilata (GMA), 2-hidroksietil metakrilata (HEMA) in trimetilolpropan triakrilata (TMPTA), ki smo jih okarakterizirali z vrstično elektronsko mikroskopijo (SEM) in FT-IR spektroskopijo. Rezultati so pokazali, da je mogoče z uporabo DDMAT uspešno izvesti UV-inducirano RAFT polimerizacijo brez dodatnega fotoiniciatorja. S polimerizacijo v masi smo uspešno sintetizirali poli(GMA-ko-EGDMA), poliTMPTA in poli(HEMA-ko-EGDMA) materiale. Pri pripravi poliHIPE materialov pa smo dosegli uspešno sintezo odprto poroznih poliHIPE materialov na osnovi poli(GMA-ko-EGDMA) in poliTMPTA. SEM posnetki so pokazali nastanek značilne poliHIPE morfologije z dobro razvitimi primarnimi porami velikosti od 25,5 μm do 84,2 μm pri poli(GMA-ko-EGDMA) oziroma 1,8 μm pri poliTMPTA ter s prisotnimi povezovalnimi porami, ki omogočajo odprto porozno strukturo materiala. Pri sistemih na osnovi HEMA monomera smo sicer uspeli sintetizirati poli(HEMA-ko-EGDMA) materiale s polimerizacijo v masi, vendar smo imeli težave pri stabilizaciji HIPE emulzij. Kljub preizkušanju različnih surfaktantov, njihovih kombinacij in različnih deležev notranje faze nismo uspeli pripraviti odprto poroznih poliHIPE materialov na osnovi HEMA. FT-IR analize so v vseh primerih potrdile prisotnost pričakovanih funkcionalnih skupin in uspešno pretvorbo monomerov v polimere. Within the scope of this thesis, we investigated the feasibility of synthesizing poly(meth)acrylates via UV-induced RAFT polymerization without the use of a conventional photoinitiator. Instead, a photo-sensitive RAFT agent, 2-(dodecylthiocarbonothioylthio)-2-methylpropanoic acid (DDMAT), was employed, serving both as a source of radicals upon UV irradiation and as the RAFT reagent. Polymers were synthesized by bulk polymerization as well as by polymerization of the monomer phase in high internal phase emulsions (polyHIPEs). Materials based on glycidyl methacrylate (GMA), 2-hydroxyethyl methacrylate (HEMA), and trimethylolpropane triacrylate (TMPTA) were prepared and characterized using scanning electron microscopy (SEM) and Fourier-transform infrared (FT-IR) spectroscopy. The results demonstrated that UV-induced RAFT polymerization can be successfully carried out using DDMAT without the addition of a photoinitiator. Bulk polymerization enabled the successful synthesis of poly(GMA-co-EGDMA), polyTMPTA, and poly(HEMA-co-EGDMA) materials. In the case of polyHIPE materials, the successful preparation of open-porous polyHIPEs based on poly(GMA-co-EGDMA) and polyTMPTA was achieved. SEM images revealed the formation of the characteristic polyHIPE morphology, featuring well-developed primary pores with sizes ranging from 25.5 to 84.2 μm for poly(GMA-co-EGDMA) and approximately 1.8 μm for polyTMPTA, together with interconnected windows that provide an open porous network. For HEMA-based systems, poly(HEMA-co-EGDMA) materials were successfully synthesized by bulk polymerization; however, difficulties were encountered in stabilizing the HIPEs. Despite evaluating various surfactants, their combinations, and different internal phase fractions, it was not possible to prepare open-porous HEMA-based polyHIPE materials. FT-IR analyses confirmed the presence of the expected functional groups and the successful conversion of monomers into polymers in all cases. UV-inducirana polimerizacija RAFT polimerizacija poliHIPE svetlobno občutljivi RAFT reagent UV-induced polymerization RAFT polymerization polyHIPE light-sensitive RAFT reagent true true false Slovenski jezik Angleški jezik Diplomsko delo/naloga 2026-09-02 10:39:42 2026-09-22 16:00:33 2026-09-23 03:08:37 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_Sitar_Sasa_2026.pdf UN_Sitar_Sasa_2026.pdf 1 E523C4152BF63888917B9F9B9157E8DB ea19dc68c8289576113b3f86362162211e16f5bfff70f8f559fc1d7bec28ec6f edca9631-b66d-11f1-9ea3-00155d0001be https://dk.um.si/Dokument.php?lang=slv&id=213141 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0