INTERACTION OF POLYVINYLPYRROLIDONE WITH METAL CHLORIDE AQUEOUS SOLUTIONS

查看全文 作　　者：Mohammad Saleem [1]Khan;Khaista [1]Gul;Najeeb Ur [1]Rehman 机构地区：[1]National Center of Excellence in Physical Chemistry, University of Peshawar, Peshawar 25120, Pakistan,National Center of Excellence in Physical Chemistry, University of Peshawar, Peshawar 25120, Pakistan,National Center of Excellence in Physical Chemistry, University of Peshawar, Peshawar 25120, Pakistan 出　　处：《Chinese Journal of Polymer Science》索引2004年第22卷第6期,共4页 基　　金：This work was financially supported by the Higher Education Commission (HEC), Pakistan in the form of an HEC researchproject. 摘　　要：Interactions of polyvinylpyrrolidone (PVP) with metal chlorides (MgCl 2 , CaCl 2 , KCl and BaCl 2 ) have been investigated by viscometric and spectrophotometric techniques in aqueous solutions. Intrinsic viscosity [η] of (PVP) has shown a discontinuity with varying concentration of metal chlorides. The decreasing order of effectiveness of cation is K 1+ > Ca 2+ > Mg 2+ > Ba 2+ for poly(vinylpyrrolidone) solution. Changes in the absorption spectra of the cosolutes were observed in the presence of PVP in the lower limit of the UV-visible region i.e. 200-210 nm. These changes were attributed to interaction of PVP molecules with the cosolute molecules. As the concentration of the cosolute increased, a red shift in the peaks was observed, indicating an increase in interaction between PVP and cosolutes. 关 键 词：Polyvinylpyrrolidone, PVP, METAL chlorides, Interaction, INTRINSIC Viscosity