Production of nanoparticles of methyl methacrylate and butyl methacrylate copolymers by microemulsion polymerization in the presence of maleic acid terminated poly(N-acetylethylenimine) macromonomers as cosurfactant |
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Authors: | Ceyhun Babaç Geta David Erhan Pi?kin |
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Institution: | a Chemical Engineering Department, Bioengineering Division, Faculty of Engineering, TÜB?TAK--Center of Excellence: B?YOMÜH, Hacettepe University, 06532 Beytepe, Ankara, Turkey b Department of Macromolecules, “Gh. Asachi” Technical University, 6600 Jassy, Romania |
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Abstract: | In this study, MMA/BMA copolymer nanoparticles were synthesized in oil-in-water microemulsions that were stabilized by sodium dodecyl sulphate (SDS) and initiated by potassium persulphate KPS. Maleic acid terminated poly(N-acetylethylenimine) (PNAEI) with two different chain lengths was also included in the recipe, as a cosurfactant and a comonomer. FTIR and 1H-NMR proved incorporation of the macromonomer in the structure. High polymerization yields were achieved upto 98%. The viscosity average molecular weights of the copolymers were in the range of 2.77-5.50 × 105. The glass transition temperatures of these copolymers were between 50.0 and 63.9 °C. The average diameter of nanoparticles were in range of 40-96 nm. It was possible to produce nanoparticles smaller than 100 nm and with narrower size distributions by using much lower concentrations of SDS by including the macromonomers in the microemulsion polymerization recipe. |
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Keywords: | Nanoparticles Microemulsion polymerization Methyl methacrylate and butyl methacrylate copolymers Maleic acid terminated poly(N-acetylethylenimine) macromonomers |
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