Multimethacryloxy-POSS as a crosslinker for hydrogel materials

摘要: Abstract Hybrid hydrogel materials derived from two types of polymethacrylates: rigid and flexible, crosslinked with methacryloxy-multifunctionalized polyhedral oligomeric silsesquioxane (M-POSS) were obtained in a photo-induced copolymerization process. The base monomers 2-hydroxyethyl methacrylate (HEMA; forming polymer) mixture oxyethylene glycol (di)methacrylates (forming an elastomer). Investigations included the kinetics hybrid formation selected physical mechanical properties. results discussed terms effects H-bonding viscosity compositions before curing, additional crosslinking, presence POSS cage, M-POSS aggregation rigidity/flexibility polymer. It was found that factors (diffusion, tendency to aggregation) dominate over interactions between reacting molecules (H-bonding) during polymer structure. Disorder HEMA-based material is responsible for appearance antiplasticization effect manifesting itself by lowering Tg value simultaneous increase Young modulus. Antiplasticization behavior affects also thermal stability materials. In general, cross-linking elastomeric gives quite different results; moreover, show exceptional behavior. presented are important indications selection technological curing parameters preparation M-POSS-containing