摘要
A series of uncharged, anionic, cationic, and heparinized polyetherurethanes(PEUs) was synthesized. The soft segments of these PEUs were respectively obtained by polyte-tramethylene oxide of molecular weight 1000 (PTMO-1000), polythylene glycol of molecularweight 1000 (PEG-1000), PEG-4000, and the mixture of PEG-4000 with PTMO-1000 orPEG-1000. The hard segments consisted of 4,4’ -methylene diphenylene diisocyanate (MDI)which was extended with ethylenediamie (ED), 1,4Mbutanediol (BD), N-methyldiethanolamine(MDEA), or L-Sodium α,ε-diaminocaproate (SDAC), respectively. The chemical structure of different PEUs was confirmed by nuclear magnetic resonance. Waterabsorptions were measured. The results showed that the ionic, heparinized PEUs, and the PEUscontained PEG-4000 as soft segments have higher water absorptions than ordinary PEUs. ThePEUs based mainly on PEG-4000 as soft segments are a kind of high hydroscopic polymer mate-rials, and their hydroscopicity increases with PEG-4000 in soft segment.
A series of uncharged, anionic, cationic, and heparinized polyetherurethanes (PEUs) was synthesized. The soft segments of these PEUs were respectively obtained by polyte- tramethylene oxide of molecular weight 1000 (PTMO-1000), polythylene glycol of molecular weight 1000 (PEG-1000), PEG-4000, and the mixture of PEG-4000 with PTMO-1000 or PEG-1000. The hard segments consisted of 4,4' -methylene diphenylene diisocyanate (MDI) which was extended with ethylenediamie (ED), 1,4Mbutanediol (BD), N-methyldiethanolamine (MDEA), or L-Sodium α,ε-diaminocaproate (SDAC), respectively. The chemical structure of different PEUs was confirmed by nuclear magnetic resonance. Water absorptions were measured. The results showed that the ionic, heparinized PEUs, and the PEUs contained PEG-4000 as soft segments have higher water absorptions than ordinary PEUs. The PEUs based mainly on PEG-4000 as soft segments are a kind of high hydroscopic polymer mate- rials, and their hydroscopicity increases with PEG-4000 in soft segment.
