Microemulsion photopolymerization of methacrylates stabilized with sodium dodecyl sulfate and poly(N-acetylethylenimine) macromonomers |
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Authors: | G. DavidF. Ö zer,B.C. SimionescuH. Zareie,E. Pi?kin |
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Affiliation: | a Department of Macromolecules, “Gh. Asachi” Technical University, 6600 Jassy, Romania b Chemical Engineering Department, and Bioengineering Division, Faculty of Engineering, Hacettepe University, 06532 Beytepe, Ankara, Turkey |
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Abstract: | Methyl methacrylate and butyl methacrylate were polymerized in oil-in-water microemulsions that were stabilized by sodium dodecyl sulphate (SDS). A poly(N-acetylethylenimine) (PNAEI) macromer was also included in the recipe, as a cosurfactant and a comonomer. Polymerizations were initiated by UV-irradiation. The average diameters of latex particles, obtained by STM, were in the range of 17-200 nm. The experimental data evidenced that the particle size was mainly dependent on the SDS/PNAEI ratio. Polymerization yields were around 75-85%. The synthesized copolymers have viscosity average molecular weights in the range of 2.1-2.4×106 and glass transition temperatures of 38.0-43.5°C, lower than those obtained without using PNAEI. The investigation by means of FTIR and 1H-NMR techniques revealed that PNAEI was incorporated into the nanoparticles. |
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Keywords: | Microemulsion polymerization Nanoparticles Methyl methacrylate and butyl methacrylate Poly(N-acetylethylenimine) Sodium dodecyl sulfate UV-radiation |
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