Surface modification of styrene-divinylbenzene copolymers by polyacrylamide grafting via gamma irradiation

• Published in: Polymer bulletin (Berlin, Germany) Vol. 61; no. 3; pp. 319 - 330
• Main Authors: da Cunha, Luciana, Coutinho, Fernanda M. B., Teixeira, Viviane G., de Jesus, Edgar F. O., Gomes, Ailton S.
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer-Verlag 01-09-2008; Springer; Springer Nature B.V
• Subjects: Acrylamide; Applied sciences; Bulk density; Characterization and Evaluation of Materials; Chemical analysis; Chemistry; Chemistry and Materials Science; Complex Fluids and Microfluidics; Copolymers; Divinylbenzene; Exact sciences and technology; Gamma irradiation; Gamma rays; Graft copolymers; Grafting and modifications; NMR spectroscopy; Organic Chemistry; Parameters; Physical Chemistry; Physicochemistry of polymers; Polyacrylamide; Polymer Sciences; Polymers and radiations; Radiation dosage; Soft and Granular Matter; Styrenes; Suspension polymerization; Thermogravimetry; Atom Transfer Radical Polymer; Polystyrene Chain; Copolymer Bead; Acrylamide Concentration; Benzene(divinyl) copolymer; Radiochemical grafting; Surface reaction; Graft copolymer; Experimental study; Porous material; Thermal stability; Crosslinked copolymer; Thermal properties; Acrylamide; Gamma radiation; Morphology; Acrylamide copolymer; Processing parameter; Liquid solid reaction; Kinetics; Styrene copolymer
• ISSN: 0170-0839; 1436-2449
• DOI: 10.1007/s00289-008-0962-2

Polyacrylamide chains were grafted onto styrene-divinylbenzene (S-DVB) copolymer beads using gamma radiation from a
60
Co source by applying the simultaneous method. S-DVB macroporous copolymer was synthesized by aqueous suspension polymerization and characterized by determining apparent density, surface area, pore volume distribution and water uptake. Optical and electron microscopies were used in order to observe the copolymer morphology. The effect of parameters such as monomers concentration, irradiation dose and presence of inhibitor (Mohr’s salt) on grafting reaction was studied. The grafting reaction was evaluated with the aid of elemental analysis, FTIR, HR-MAS NMR spectrometry, thermogravimetry (TG) and electron microscopy. Grafting yield (evaluated by nitrogen content) increased with acrylamide concentration and irradiation dose increasing. However, above determined values of those parameters it is observed a tendency of decreasing on the grafting yield. The presence of Mohr’s salt inhibited the production of homopolymer as well as the progress of the grafting reaction.