Synthesis of acrylic acid-based superabsorbent interpenetrated with sodium PVA sulfate using inverse-emulsion polymerization

Synthesis and characterization of poly(aspartic acid) composite hydrogels with inorganic MCM-41 cross-linker

“…This phenomenon is the same for the opposite process. In fact, the swelling capacity of a hydrogel depends on various network structural parameters [26,27], as shown in the Flory equation:…”

Effect of synthesis parameters and of temperature of swelling on water absorption by a superabsorbent polymer

“…The solution technique (in water) avoids the contamination of the polymer synthesized, but tends to increase chain transfer, which can decrease the molecular weight [9]. The inverse emulsion technique, although incurring the contamination by the emulsifier, has the advantages of an easier heat dissipation and lower viscosity and of the fact that the polymerization may occur at a higher rate to yield a high molecular weight polymer [10] [11]. Polymers from the two techniques were synthesized, and in order to try to improve the properties of the polymer, another condition of the reaction medium was changed, its pH.…”

New ethyl cellulose/acrylic hybrid latexes and coatings via miniemulsion polymerization

“…[4][5][6][7] As typical examples, we can mention the synthesis of EC-graftpoly(ε-caprolactone) and their block copolymers with poly(L-lactide), 3 EC-graftpoly(ethylene glycol) allenyl methyl ether macromonomer 8 and EC-based amphiphilic copolymers with poly(acrylic acid) or poly(poly(ethylene glycol) methyl ether methacrylate pendant chains. In the field of emulsions, ethyl cellulose can be used as an emulsifier, 9 incorporated into coatings [10][11] or used to elaborate microspheres notably for drug delivery applications. [12][13][14] The most developed procedure for the preparation of EC pseudo-latexes relies on either the emulsification/solvent evaporation (ESE) process [15][16] (which consists in the dissolution of EC in a suitable solvent, its subsequent emulsification into water phase containing suitable emulsifying agent, and finally the solvent evaporation) or miniemulsification.…”