A kind of sulfobetaine, N,N-dimethyl-N-(3- sulfopropyl )-4-ethen yl-benzenemethanaminium inner salt was synthesized from tertiary amine and propanesultone and characterized by IR a nd 1 H NMR . The blood compatibiliti...
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A kind of sulfobetaine, N,N-dimethyl-N-(3- sulfopropyl )-4-ethen yl-benzenemethanaminium inner salt was synthesized from tertiary amine and propanesultone and characterized by IR a nd 1 H NMR . The blood compatibilities of the polymers were evaluate d by platelet adhesion method. No platelet adhesion in platelet rich plasma(PRP) was observed for two hours.
A kind of polyurethane/organically modified montmorillonite (PU/OMMT) nanocomposite based on poly(propylene glycol), 1,4 butanediol and 4,4 diphenylmethane diisocyanate was prepared by solution intercalation *** resul...
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A kind of polyurethane/organically modified montmorillonite (PU/OMMT) nanocomposite based on poly(propylene glycol), 1,4 butanediol and 4,4 diphenylmethane diisocyanate was prepared by solution intercalation *** results of wide angle X ray diffraction and TEM showed that the gallery distance of OMMT in the PU matrix was 3～4?*** the hard segment content increased,the molecular chains of PU had difficulty in diffusing into the silicate layer galleries for *** electron microscopy photographs showed that OMMT layers were dispersed well into the PU matrix on the nanometer scale,and an ordered intercalation structure was *** with those of pure PU,the tensile strength,the tear strength and the elongation at break increased by about 43%,28% and 18% for PU/OMMT(92/8),*** water absorption decreased with increasing the amount of *** analysis showed that the PU/OMMT nanocomposites displayed a little higher thermal resistance than that of pure PU in the second pyrolysis stage.
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