Synthesis of multiarm star block copolymers via simplified electrochemically mediated ATRP
- 203 Downloads
Star-shaped polymers were received using β-cyclodextrin (β-CD) as core, and methyl methacrylate (MMA) arms via a simplified electrochemically mediated ATRP (seATRP). To demonstrate the living nature of the seATRP, star multiblock copolymers were successfully prepared by chain extension of the ω-functional PMMA arms with a tert-butyl acrylate (tBA), and respectively, n-butyl acrylate (BA). Novelty of this work is that the β-CD-PMMA-b-PtBA-b-PBA multiarm star block copolymers were synthesized for the first time via seATRP procedure, utilizing 4 × 10−6 mol% of CuII complex. The results from 1H NMR spectral studies support the formation of 21-arm star (co)polymers. Furthermore, the GPC traces of the arms detached from synthesized star-like (co)polymers confirms the absence of star–star coupling reactions during seATRP. It was shown as an advantage over other ATRP methods–low catalyst concentrations and narrow molecular mass distributions, while maintaining well-defined composition.
KeywordsPolymer synthesis seATRP Multiarm cyclodextrin-based star copolymers
Financial support from U-553/DS is acknowledged. NMR spectra were recorded in the Laboratory of Spectrometry, Faculty of Chemistry, Rzeszow University of Technology and were financed from DS budget.
- Glöckner P, Schollmeyer D, Ritter H (2002). X-ray diffraction analysis of butyl- and isobornyl acrylate/heptakis(2,6-di-O-methyl)-β-cyclodextrin complexes and correlation to 1H NMR-spectra. Des Monomers Polym 5:163–172. DOI: 10.1163/156855502760157890
- Kepola EJ, Loizou E, Patrickios CS, Leontidis E, Voutouri C, Stylianopoulos T, Wesdemiotis C (2015) Amphiphilic polymer conetworks based on end-linked “core-first” star block copolymers: structure formation with long-range order. ACS Macro Lett 4:1163–1168. doi: 10.1021/acsmacrolett.5b00608 CrossRefGoogle Scholar
- Quadrat O, Horský J, Bradna P, Šňupárek JR, Baghaffar GA (2001) Thickening of butyl acrylate/styrene/2-hydroxyethyl methacrylate/acrylic acid lattices with dispersion of crosslinked ethyl acrylate/methacrylic acid copolymer. Prog Org Coat 42:188–193. doi: 10.1016/S0300-9440(01)00166-7 CrossRefGoogle Scholar
- Xu J, Liu S (2009) Synthesis of well-defined 7-arm and 21-arm poly(N-isopropylacrylamide) star polymers with β-cyclodextrin cores via click chemistry and their thermal phase transition behavior in aqueous solution. J Polym Sci Part A Polym Chem 47:404–419. doi: 10.1002/pola.23157 CrossRefGoogle Scholar