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A new thermosensitive polymer as nonadhesive liquidembolism material
Chengru Zhao,Qin Wang,Jianwen Meng,Wenguang Liu,Zuoqin Liu 한국물리학회 2005 Current Applied Physics Vol.5 No.5
Thermosensitive copolymers poly(NIPAm-co-NNPAm) ofN-isopropylacrylamide (NIPAm) withN-n-propylacrylamide(NNPAm) were synthesized by free radical copolymerization using potassium persulfate (KPS) and sodium sulte (Na2SO3) as ini-tiator. FTIR and1H NMR conrmed the structure of the copolymer poly(NIPAm-co-NNPAm). The dynamic mechanical analysisand dynamic contact angle were determined. The lower critical solution temperature (LCST) of copolymers was investigated byDSC. The results indicated the LCST decreased with the higher NNPAm contents. The phase transition of the copolymer solutionoccurred at body temperature within 30 s and the copolymers changed into soft solids. The copolymer could be used as a new non-adhesive liquid embolism material for the intervenient therapy of the cerebral arterio-venous malformation (AVM)..