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Association of block copolymers of ethylene oxide and propylene oxide in aqueous solution

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  1. Tez No: 400666
  2. Yazar: HAYDAR ALTINOK
  3. Danışmanlar: DR. COLIN BOOTH
  4. Tez Türü: Doktora
  5. Konular: Kimya, Chemistry
  6. Anahtar Kelimeler: Belirtilmemiş.
  7. Yıl: 1999
  8. Dil: İngilizce
  9. Üniversite: The University of Manchester
  10. Enstitü: Yurtdışı Enstitü
  11. Ana Bilim Dalı: Kimya Ana Bilim Dalı
  12. Bilim Dalı: Belirtilmemiş.
  13. Sayfa Sayısı: 266

Özet

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Özet (Çeviri)

Oxyethylene/oxypropylene diblock copolymers (EmPn) and triblock copolymers (EmPnEm and PnEmPn) were prepared by sequential anionic polymerisation and characterised by gel permeation chromatography and NMR spectroscopy. Dilute aqueous solutions of copolymers Eio2P37> E57p46Es7 and P19E113P19 were investigated by Dynamic Light Scattering, Static Light Scattering (including Refractive Index measurement) and Surface Tension. The Gel-Sol behaviour of concentrated solutions was also investigated. The effect of block structure on the association behaviour of copolymers EmPn, EmPnEm, PnEmPn was assessed by their association numbers (Nw). Nw: EmPn> EmPnEm> PnEmPn. Dilute aqueous solutions of copolymers E104P52, E92P55* Eio5p60 and E98P73 were investigated by Dynamic Light Scattering, Static Light Scattering (including Refractive Index measurement) and Surface Tension. The Gel-Sol behaviour of concentrated solutions was also investigated. The effect of block structure on the association behaviour of copolymer was assessed by their critical micellar-eoncentration and association numbers (Nw) cmc : E104P52 > Ep2P55> E105P6O > E98P73 and for Nw: E98P73 > E92P55 > Ei05P6O>EiO4P52. Dilute aqueous solutions of copolymers E45P39, E75P47 and E104P52 were investigated by Dynamic Light Scattering, Static Light Scattering (including Refractive Index measurement) and Surface Tension. The Gel-Sol behaviour of concentrated solutions was also investigated. The effect of block structure and the association behaviour of copolymer was assessed by their critical micellar concentration and association numbers (Nw). cmc:Eio4P52>E75P47>E45P39 andforNw:E45P39> E104P52> E75P47 ?No portion of the work referred to in this thesis has been submitted in support of an application for another degree or qualification of this or any other university or other institute of learning. Copyright in text of this thesis rests with the Author. Copies (by any process) either in full, or of extracts, may be made only in accordance with instructions given by the Author and lodged in the John Rylands University Library of Manchester. Details may be obtained from the Librarian. This page must form part of any such copies made. Further copies (by any process) of copies made in accordance with such instructions may not be made without the permission (in writing) from the Author, The ownership of any intellectual property rights which may be described in this thesis is vested in the University of Manchester, subject to any prior agreement to the contrary, and may not be made available for use by third parties without the written permission of the University, which will prescribe the terms and conditions of any such agreement.The Author graduated with a B.Sc. degree in Chemistry at the Gazi University / Ankara, Turkey in 1985. Having graduated, he started his M. Sc. and he completed his degree in November 1988. He worked meanwhile in the same Department as a Research Assistant until November 1993. Since July 1994 until the present time, he has been engaged in full time research at the University of Manchester, Department of Chemistry. The work carried out throughout this period forms the basis of this thesis.

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