Stress and neutron scattering measurements on linear polymer melts undergoing steady elongational flow

Publication: Research - peer-reviewJournal article – Annual report year: 2012

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We use small-angle neutron scattering to measure the molecular stretching in polystyrene melts undergoing steady elongational flow at large stretch rates. The radius of gyration of the central segment of a partly deuterated polystyrene molecule is, in the stretching direction, increasing with the steady stretch rate to a power of about 0.25. This value is about half of the exponent observed for the increase in stress value σ, in agreement with Gaussian behavior. Thus, finite chain extensibility does not seem to play an important role in the strongly non-linear extensional stress behavior exhibited by the linear polystyrene melt.
Original languageEnglish
JournalRheologica Acta
Publication date2012
Volume51
Issue5
Pages385-394
ISSN0035-4511
DOIs
StatePublished
CitationsWeb of Science® Times Cited: 3

Keywords

  • Scattering, Polymer melt, Uniaxial extension, Polystyrene
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