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000021349 084__ $$2WoS$$aMechanics
000021349 1001_ $$0P:(DE-HGF)0$$aHassager, O.$$b0
000021349 245__ $$aStress and neutron scattering measurements on linear polymer melts undergoing steady elongational flow
000021349 260__ $$aBerlin$$bSpringer$$c2012
000021349 300__ $$a385 - 394
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000021349 440_0 $$08825$$aRheologica Acta$$v51$$x0035-4511$$y5
000021349 500__ $$aWe are grateful to the Danish Technical Research Council for financial support to the Danish Polymer Centre, to the Danish Natural Science Council for financial support in the DANSCATT grant and to the Paul Scherrer Institut for use of their neutron beam facility, and the SoftComp EU-Networks of Excellence.
000021349 520__ $$aWe use small-angle neutron scattering to measure the molecular stretching in polystyrene melts undergoing steady elongational flow at large stretch rates. The radius of gyration of the central segment of a partly deuterated polystyrene molecule is, in the stretching direction, increasing with the steady stretch rate to a power of about 0.25. This value is about half of the exponent observed for the increase in stress value sigma, in agreement with Gaussian behavior. Thus, finite chain extensibility does not seem to play an important role in the strongly non-linear extensional stress behavior exhibited by the linear polystyrene melt.
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000021349 65320 $$2Author$$aScattering
000021349 65320 $$2Author$$aPolymer melt
000021349 65320 $$2Author$$aUniaxial extension
000021349 65320 $$2Author$$aPolystyrene
000021349 7001_ $$0P:(DE-HGF)0$$aMortensen, K.$$b1
000021349 7001_ $$0P:(DE-HGF)0$$aBach, A.$$b2
000021349 7001_ $$0P:(DE-HGF)0$$aAlmdal, K.$$b3
000021349 7001_ $$0P:(DE-HGF)0$$aRasmussen, H.K.$$b4
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