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A szintézist két lépésben valósítottuk meg: első lépésben a prepolimert állítottuk elő, majd a képződött prepolimert szacharózzal térhálósítottuk. A polimer kémiai szerkezetét MALDI-TOF MS, 1\nH-NMR és\nIR spektroszkópiával vizsgáltuk. A duzzadási vizsgálatokat különböző oldószerekben végeztük el. A térhálósűrűség meghatározásához a Flory-Rehner összefüggést alkalmaztuk. Tapasztalataink alapján a térhálósító\nszacharóz mennyiségének növelése csökkentette a térhálósűrűséget, melyet a DMA vizsgálatok is alátámasztottak. A feszültség-megnyúlás görbéket modelleztük. \nIn this presentation, we will discuss the preparation, characterization and possible uses of polyurethanes. A series of different compositions of PUR samples were prepared. Synthesis of the polymers were\ndone in two steps: synthesis of the pre-polymer and the network formation. MALDI-TOF MS, 1\nH-NMR and\nIR spectroscopy were used for chemical characterization. Swelling experiments of the polymers were performed with various solvents. Flory-Rehner equation was used for the determination of crosslink density. We\nfound that the crosslink density decreased with the increasing sucrose content. Dynamic mechanical analysis\n(DMA) also supported our finding. Furthermore, the stress-strain curves for the PUR samples were recorded\nand modeled. 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