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Synthesis, association and surface morphology of poly (ethylene oxide)-polystyrene block copolymer

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Abstract

Synthesis of block copolymers is of great interest due to their abilities to self-assemble into a variety of structured, ordered, or partially ordered morphologies, and because they have number of applications. Three samples of poly(styrene)-block-poly(ethylene oxide) (PS-b-PEO) were synthesized by employed atom transfer radical polymerization (ATRP) technique and using monofunctional PEO-macroinitiator (mPEO-F) as starting material. The composition of the copolymer was obtained through NMR spectroscopy, whereas the molecular mass and degree of dispersity from light scattering and GPC/SEC. The CMC was obtained from the dependence of hydrodynamic radius (RH) over the concentration and found that it was decreased with contents of polystyrene and temperature. The RH dependence also indicated that shape of micelles change after certain concentration of copolymer. The reduced viscosity data plotted against concentration did not show a simple straight line as expected in case of polymers; rather, its slope was changed at a particular concentration, indicating sudden variation in the self-assembling behavior of the copolymers. The transmission electron microscopic (TEM) results of the material indicated the morphology pattern of two-dimensional arrays of hexagons with holes.

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Acknowledgment

One of the authors (M.N) is highly thankful to Higher Education Commission, Islamabad, Pakistan, for the financial support and execution of this project. The author is also thankful to CEOS (Center for Electron Optical Studies) University of Bath, United Kingdom, for providing laboratory facilities.

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Authors and Affiliations

  1. Department of Chemistry, Hazara University, Mansehra, KPK, Pakistan

    Mohsan Nawaz & Imad Ud-Din

  2. Department of Chemistry, Gomal University, D. I. Khan, KPK, Pakistan

    Musa Kaleem Baloch

  3. Department of Chemistry, University of Bath, Claverton Down, Bath, UK

    Gareth James Price

  4. Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah, 21589, Kingdom of Saudi Arabia

    El-Sayed El-Badawey El-Mossalamy

Authors
  1. Mohsan Nawaz
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  2. Musa Kaleem Baloch
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  3. Gareth James Price
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  4. Imad Ud-Din
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  5. El-Sayed El-Badawey El-Mossalamy
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Corresponding author

Correspondence to Musa Kaleem Baloch.

Appendix-1 Mechanism for the synthesis of PEO macro-imitator and block copolymer

Appendix-1 Mechanism for the synthesis of PEO macro-imitator and block copolymer

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Nawaz, M., Baloch, M.K., Price, G.J. et al. Synthesis, association and surface morphology of poly (ethylene oxide)-polystyrene block copolymer. J Polym Res 20, 180 (2013). https://doi.org/10.1007/s10965-013-0180-y

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  • DOI: https://doi.org/10.1007/s10965-013-0180-y

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