The amphiphilic grafting copolymer,Polyepoxymethylsiloxane-g-poly(N,N-dimethylacryl amide),was prepared by epoxy ring-opening polymerization of polyepoxymethylsiloxane(PEMS) and hydroxyl-terminated poly(N,N-dimethylac...The amphiphilic grafting copolymer,Polyepoxymethylsiloxane-g-poly(N,N-dimethylacryl amide),was prepared by epoxy ring-opening polymerization of polyepoxymethylsiloxane(PEMS) and hydroxyl-terminated poly(N,N-dimethylacrylamide)(OH-PDMAAm).The structure of the PEMS-g-PDMAAm copolymer was characterized by FTIR.The micellization of PEMS-g-PDMAAm in aqueous solution was investigated by Fluorescence spectrum and dynamic laser light scattering.The results indicated that when the concentration was above the 0.13mg/mL,the grafting copolymer associated and the average hydrodynamic radiuses of micelles were 121nm and 46nm.展开更多
Graft copolymer containing poly(ethylene oxide)side chains on a polystyrene backbone were acrylamided.The amide groups in the copolymers were ionized by using potassium naphthalene,and grafting was achieved by utilizi...Graft copolymer containing poly(ethylene oxide)side chains on a polystyrene backbone were acrylamided.The amide groups in the copolymers were ionized by using potassium naphthalene,and grafting was achieved by utilizing the amide anions as initiator sites for the polymerization of ethylene oxide at 70℃.The graft copolymers was characterized with respect to molecule weight and composition using NMR,IR,GPC,and DSC.GPC result from the graft copolymer sample suggested a narrow size distribution.展开更多
文摘The amphiphilic grafting copolymer,Polyepoxymethylsiloxane-g-poly(N,N-dimethylacryl amide),was prepared by epoxy ring-opening polymerization of polyepoxymethylsiloxane(PEMS) and hydroxyl-terminated poly(N,N-dimethylacrylamide)(OH-PDMAAm).The structure of the PEMS-g-PDMAAm copolymer was characterized by FTIR.The micellization of PEMS-g-PDMAAm in aqueous solution was investigated by Fluorescence spectrum and dynamic laser light scattering.The results indicated that when the concentration was above the 0.13mg/mL,the grafting copolymer associated and the average hydrodynamic radiuses of micelles were 121nm and 46nm.
文摘Graft copolymer containing poly(ethylene oxide)side chains on a polystyrene backbone were acrylamided.The amide groups in the copolymers were ionized by using potassium naphthalene,and grafting was achieved by utilizing the amide anions as initiator sites for the polymerization of ethylene oxide at 70℃.The graft copolymers was characterized with respect to molecule weight and composition using NMR,IR,GPC,and DSC.GPC result from the graft copolymer sample suggested a narrow size distribution.
