| Small-angle neutron scattering study of the relaxation of a melt of polybutadiene H-polymers following a large step strain (2004) | |||||||||||
Abstract | |||||||||||
| Macromolecules Small Angle Neutron Scattering Study the Relaxation Melt Polybutadiene Polymers Following Large Step Strain Heinrich Pyckhout Hintzen Allgaier Richter Straube McLeish Wiedenmann Blackwell and Read Forschungszentrum Julich Institut fur Festkorperforschung Postfach Julich Germany Martin Luther Universitat Halle Wittenberg Fachbereich Physik Halle Germany Department Physics and Astronomy University Leeds Leeds Hahn Meitner Institut Berlin Germany Department Applied Maths and Theoretical Physics Centre for Mathematical Sciences Wilberforce Road Cambridge and Department Applied Mathematics University Leeds Leeds Received August ABSTRACT present scattering data from melt shaped polybutadiene polymers which the central crossbar the polymers wholly labeled with deuterium The melt was uniaxially stretched factor and using careful temperature control the sample the neutron scattering pattern was measured after several different times relaxation The scattering data are compared against the predictions new theory based upon the tube model but which includes the additional effect elastic inhomogeneities the entanglement network find that with this new theory one can obtain good representation the data using parameters that are consistent with relaxation times obtained from tube model description the linear rheological data The most important aspect these data increasing anisotropy the correlation hole peak and this appears directly related the elastic inhomogeneities One fu | |||||||||||
Publication details | |||||||||||
| |||||||||||