Synthesis and Characterization of Starch‐Glycidyl Methacrylate‐Acrylic Acid Cation Exchange Composites

Abstract

The synthesis of starch/glycidyl methacrylate/acrylic acid cation exchange composites was achieved by bulk polymerizing of acrylic acid (AA)/glycidyl methacrylate (GMA) mixtures in presence of starch using sodium peroxydisulphate/sodium sulphite initiating redox system. The effect of the concentration of each of sodium peroxydisulphate sodium sulphite, AA and GMA as well as polymerization temperature on the formation of the composites was investigated. Five kinds of composites of different carboxyl contents were prepared and characterized by investigating their potentiometric titrations, durabilities to use, as well as water swellabilities and solubilities.

Preparation and characterization of cellulose/glycidyl methacrylate/acrylic acid cation exchange composites

“…In the mixture of AA and GMA, it is anticipated that some of these monomers undergo an epoxy-carboxy reaction [13-151 giving rise to the divinyl monomer I [2], as follows:…”

“…It is as well to emphasize that monomer I is a useful crosslinking agent which copolymerizes with other monomers and/or cellulose [2]. The product of all these reactions and/or interactions is a mixture of polymers, copolymers, grafted and unreacted cellulose, all in a state of entanglement and/or crosslinked with each other to different extents.…”

Preparation and Characterization of Starch/Methylelnebisacrylamide/Dimethylaminoethyl Methacrylate Anion Exchange Composite

“…The time elapsed between introducing the beaker into the water bath and solidification was considered as the solidification time (ST). The unreacted rnonomers were extracted from the polymerization products using an equivolume acetone/water mixture that contained 0.2% hydroquinone, as described in previous study [3], and the remaining solid (crude composite) was purified from water soluble fragments by boiling water according to previous report [2].…”

“…Factors affecting the synthesis as well as characterization of the prepared composite are reported. [3] utilized N-methylolacrylamide and glycidyl methacrylate,…”

Preparation and Utilization of New Carboxyl Group Containing Cation Exchangers Based on Starch Using a Dry Reaction Method

“…As a part of our major research and development activities, we have paid a great deal of attention to synthesis and characterization of modified starch with a view of promoting its industrial utilization. Preparation and characterization of starch based cation and anion exchange resins [2][3][4][5], and their utilization in removing acid dyes [6], basic dyes [7], or hazardous anions [8] from aqueous and effluents liquors were examples of these studies. The use of starch in a sizing [9,10] and finishing [11] formulations has also been studied.…”