The development of conducting polymers has been an active subject in the world since the late in 1970’s. The preparation of polyaeetylene-like polymers by dehydroehlorination of polyvinylchloride (PVC) is a very econ...The development of conducting polymers has been an active subject in the world since the late in 1970’s. The preparation of polyaeetylene-like polymers by dehydroehlorination of polyvinylchloride (PVC) is a very economical and useful procedure and,hence, a focus of enormous interest of both theoretieians and experimentalists. In recent years, many methods for dehydrochlorination of PVC in solution have been studied widely and many kinds of catalytic mechanisms have been suggested.展开更多
Cross linked polystyrene microspheres with quarternary ammonium have been prepared via surfactant\|free emulsion polymerization. It was confirmed that the sizes of the microspheres decreased at a certain extent when t...Cross linked polystyrene microspheres with quarternary ammonium have been prepared via surfactant\|free emulsion polymerization. It was confirmed that the sizes of the microspheres decreased at a certain extent when the contents of the initiator,cross linked reagent or functional monomer were increased.TEM observation indicated that the size of polymer microspheres ranged from tens of nanometer to hundreds of nanometer. The XPS results showed that the hydrophilic quarternary ammonium groups tended to be rich on the surface of the microspheres during the polymerization.In addition,their swelling ratio can be investigated by using the “ in situ" swelling measurement of polymer microspheres.展开更多
基金Supported by the National Natural Science Foundation of China
文摘The development of conducting polymers has been an active subject in the world since the late in 1970’s. The preparation of polyaeetylene-like polymers by dehydroehlorination of polyvinylchloride (PVC) is a very economical and useful procedure and,hence, a focus of enormous interest of both theoretieians and experimentalists. In recent years, many methods for dehydrochlorination of PVC in solution have been studied widely and many kinds of catalytic mechanisms have been suggested.
文摘Cross linked polystyrene microspheres with quarternary ammonium have been prepared via surfactant\|free emulsion polymerization. It was confirmed that the sizes of the microspheres decreased at a certain extent when the contents of the initiator,cross linked reagent or functional monomer were increased.TEM observation indicated that the size of polymer microspheres ranged from tens of nanometer to hundreds of nanometer. The XPS results showed that the hydrophilic quarternary ammonium groups tended to be rich on the surface of the microspheres during the polymerization.In addition,their swelling ratio can be investigated by using the “ in situ" swelling measurement of polymer microspheres.
