Entangled Polymer Melts in Extensional Flow: Synthesis, Rheology, Neutron Scattering

Andriy Dorokhin

    Research output: Book/ReportPh.D. thesisResearch

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    Abstract

    This thesis contains 5 chapters and reprints in Appendices, combined of both published and unpublished materials.
    The first chapter is an introduction to the goals, methods and problem identification of the project of the entangled polymer melts in extensional flow, which is aimed to shed some light on certain aspects of polymer physics. This became possible because of a valuable opportunity of collaboration of scientists, whose main research areas are polymer synthesis, rheology of complex fluids and small-angle neutron scattering.
    Consequently, the second chapter describes the model polymer syntheses, made by living anionic polymerization. It contains the description of well-established, as well as new block copolymer syntheses.
    The third chapter briefly touches the area of the extensional rheology of complex fluids and has the description of an innovative method, filament stretching rheometry, which can measure the extensional rheology of non-Newtonian fluids during a homogeneous uniaxial elongation, providing the results for the tensile stress and molecular conformations. Forth, the fourth chapter delineates the area of SANS, provides the characteristics of the instruments from the different beamlines and depicts some issues that are significant and specific to the quenched polymer samples. It also contains the computational algorithms of the polymer structure factors and shows the way to procure essential parameters of the macromolecular conformations.
    The conclusion, Chapter 5, briefly recapitulates the progress in the area of the project.
    Original languageEnglish
    PublisherDTU Nanotech
    Number of pages140
    Publication statusPublished - 2018

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