Polymerization and characterization of isobutyl methacrylate

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2002

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İnci, Esin

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Methacrylic polymers possess a remarkable combination of useful properties, including coatings, adhesives, textiles, oil additives, biomedical appliances, and optical applications. The monomer polymerizes rapidly and readily. In this study, the polymerization of isobutyl methacrylate was studied in bulk and solution by gamma radiation. The polymerization in bulk form was carried in vacuum and in open atmosphere. The polymerization curves showed S-type behavior and auto acceleration. The polymers obtained were insoluble in most common solvents. Most probably, they have very high molecular weights and are crosslinked. In order to overcome this problem, isobutyl methacrylate was polymerized in toluene and dichloromethane solutions. Chain transfer constants were calculated for these solvents. The molecular weights of polymers were measured by light scattering and viscosity methods. It was seen that the molecular weight of polymer depends on both the nature of solvent and the solvent-monomer ratio. K (3.96xl0"5) and a (0,71) constants in viscosity-molecular weight relation were calculated from data obtained by light scattering and viscosity in toluene at 25° C. The polymer was characterized by FTIR, DSC and !H and 13C NMR techniques.

Subject Keywords

Isobutyl methacrylate, Gamma radiation, Bulk polymerization, Solution polymerization, Chain transfer, Viscosity, Light scattering, Characterization

URI

https://hdl.handle.net/11511/12370

Collections

Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

E. İnci, “Polymerization and characterization of isobutyl methacrylate,” Middle East Technical University, 2002.