Study On Metallic Ion Containing Acrylic Acid Polymer

In this paper, the studies on metallic ion containing polyacrylate at home and abroad was reviewed detailedly, and the synthesis, structure and properties of two kinds of polyacrylate: sodium ion containing polyacrylate and zinc ion containing polyacrylate which both have special properties were researched in detail.If slightly crosslinked, sodium ion containing polyacrylate(SCPSA) was one kind of superabsorbent polymer which showed excellent absorbing property to water and could be used in widely fields. In order to solve the limitation of present synthesis methods of SCPSA, the UV-curing method was firstly used in preparing slightly crosslinked sodium ion containing polyacrylate in this paper. The influences of preparation conditions: UV radiation intensity, photo-initiator's kinds and contents, crosslinker's kinds and contents, sodium content, monomer concentration on the properties of polymer were investigated.Water soluble polymers such as poly(vinyl alcohol)(PVA), polyoxyethylen e(PEO), and linear poly(sodium acrylate)(PSA) made in our lab were firstly i ntroduced into the reaction system to improve the absorbing rate and capacity of SCPSA, and orthogonal experiment was designed to evaluate the influenc es of five synthesis conditions and their reciprocity.Zinc ion containing polyacrylate(PZA) was synthesized by solution polym erization and its structure was determined with complexometric titration, IR, DSC,SEM, etc. The results showed that zinc ion in the polymer formed ionic bond and coordinative bond with carboxylic group. The studies on the film propertyof PZA indicated that the film highly tolerate water but its adherence was a little weak.The copolymer of zinc ionized acrylic acid and butyl acrylate was preparedwith by heterogeneous polymerization with redox system as initiator. The constants of K, a was determined by testing the intrinsic viscosity and weight average molecular weight. And so the equation of [ a ] -Mw was obtained: [ n]=0.5339M0.46, M=([ n ]/0.5339)1/0.46 . Thereby the influences of synthesis conditions on the molecular weights of the copolymers were investigated. The structure of the copolymer was studied with complexometric titration, IR, DSC, SEM, etc.The studies on solubility of the copolymer showed that they could be dissolved in water and the solution was easy to form film which revealed excellent water tolerance and strong adherence.