Aydin Can

Technische Universiteit Eindhoven, Eindhoven, North Brabant, Netherlands

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Publications (5)17.01 Total impact

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    ABSTRACT: The solubility behavior of well-defined poly(methyl acrylate) homopolymers as well as polystyrene-block-poly (methylacrylate) block copolymers is discussed in this contribution. A solubility screening in ethanol-water solvent mixtures was performed in a high-throughput manner using parallel turbidimetry revealing upper critical solution temperature behavior for poly(methyl acrylate). Moreover, the self-assembly behavior of the block copolymers into micellar structures was investigated by dynamic light scattering (DLS), transmission electron microscopy (TEM), and cryo-TEM revealing upper critical solution temperature switchability of the micelles, which was evaluated by DLS at different temperatures. (C) 2011 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 49: 3681-3687, 2011
    Journal of Polymer Science Part A Polymer Chemistry 01/2011; 49(17):3681-3687. · 3.54 Impact Factor
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    ABSTRACT: a b s t r a c t The synthesis of well-defined block copolymers from styrene and methyl acrylate via ATRP is discussed in this contribution. Kinetic studies on these block copolymerizations as well as characterization studies were performed to investigate the monomer composition in the respective PS and PMA blocks. MALDI-TOF-MS was performed to clarify the exact number of repeating units of each block and the total number of units in the block copolymer. Block copolymers up to 22 kDa could be analyzed by MALDI-TOF-MS, whereby polymers with PMA as first block showed a large second distribution corresponding to PMA homopoly-mers. However, SEC demonstrated that only a small amount of homopolymer was present indicating that care needs to be taken with interpreting MALDI-TOF-MS data, which is a qualitative rather than a quantitative technique.
    European Polymer Journal - EUR POLYM J. 08/2010; 46(9).
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    ABSTRACT: Nitroxide-mediated radical polymerization has been used for the preparation of pentafluorostyrene (PFS) homopolymers and random copolymers of PFS and oligo(ethyleneglycol) methacrylate (OEGMA(8.5)). The poly(pentafluorostyrene) homopolymers were reacted with thiophenol at different ratios at room temperature in the presence of triethylamine. The "clicked" polymers were characterized by H-1 and F-19 NMR spectroscopy and size exclusion chromatography. Moreover, the copolymerization kinetics of the PFS and OEGMA(8.5) copolymers was followed, and the phase transition behavior of random copolymers with different compositions was discussed. Furthermore, copolymers of PFS and 2-(dimethylamino) ethyl methacrylate (DMAEMA) were prepared at various mole ratios, and the copolymer with a 10:90 ratio, respectively, was soluble in water at room temperature. Turbidimetry measurements were performed for PFS and OEGMA(8.5) or DMAEMA copolymers to determine their cloud points. Finally, the PFS and OEGMA(8.5) copolymer with a mole ratio of 60:40 was reacted further with thiophenol to increase the hydrophobic part in the copolymer. The cloud points of the obtained copolymers could be tuned from 87 to 33 degrees C by using not only the controlled radical polymerization but also the "click" reaction in a controlled fashion. (C) 2010 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 48: 1278-1286, 2010
    Journal of Polymer Science Part A Polymer Chemistry 02/2010; 48(6):1278 - 1286. · 3.54 Impact Factor
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    ABSTRACT: We report on the controlled-radical polymerization of the photocleavable o-nitrobenzyl methacrylate (NBMA) and o-nitrobenzyl acrylate (NBA) monomers. Atom transfer radical polymerization (ATRP), reversible addition-fragmentation chain transfer polymerization (RAFT), and nitroxide-mediated polymerization (NMP) have been evaluated. For all methods used, the acrylate-type monomer does not polymerize, or polymerizes very slowly in a noncontrolled manner. The methacrylate-type monomer can be polymerized by RAFT with some degree of control (PDI ∼ 1.5) but leading to molar masses up to 11,000 g/mol only. ATRP proved to be the best method since a controlled-polymerization was achieved when conversions are limited to 30%. In this case, polymers with molar masses up to 17,000 g/mol and polydispersity index as low as 1.13 have been obtained. © 2009 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 47: 6504–6513, 2009
    Journal of Polymer Science Part A Polymer Chemistry 10/2009; 47(23):6504 - 6513. · 3.54 Impact Factor
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    ABSTRACT: Micellization and micellar gel formation of poly(styrene)-block-poly(methyl methacrylate) [PS-b-PMMA] are demonstrated in a water-ethanol solvent mixture; full hydration of the PMMA causes a large radius of gyration resulting in micellar gel formation at only 1 wt% polymer concentration.
    Chemical Communications 10/2009; · 6.38 Impact Factor

Publication Stats

15 Citations
17.01 Total Impact Points

Institutions

  • 2009–2011
    • Technische Universiteit Eindhoven
      • Department of Chemical Engineering and Chemistry
      Eindhoven, North Brabant, Netherlands
  • 2010
    • Friedrich-Schiller-University Jena
      • Institut für Organische Chemie und Makromolekulare Chemie
      Jena, Thuringia, Germany