Perfluoropolyether modified waterborne shape memory polyurethaneurea ionomers for potential medical implant application

摘要

A series of cross-linked fluorinated waterborne shape memory polyurethaneurea (PUU)ionomers were synthesized from polycaprolactone diol,perfluoropolyether diol (PFPE),dimethylolproionic acid,isophorone diisocyanate,ethylenediamine (EDA) and diethylenetriamine (DETA).The effect of PFPE content in the soft segment and the degree of cross-linking on the molecular structure and the properties of for these PUU fihns was examined and studied.Differential scanning calorimetry showed that the transition temperature for these Tm type shape memory PUU could be facially tuned by PFPE weight percentage and EDA/DETA ratio in the range between 30℃ to 50℃,in the vicinity of body temperature.The dependence of their properties on hydrogen-bonds evaluated by FT-IR was also discussed.