Bulletin of the American Physical Society
APS March Meeting 2011
Volume 56, Number 1
Monday–Friday, March 21–25, 2011; Dallas, Texas
Abstract: C1.00084 : An apparatus for in situ x-ray scattering studies of polymer melts during homogenous uniaxial extensional flow
Author:
In situ x-ray scattering methods have been broadly applied to study the structural
dynamics of polymers and other complex fluids under flow, and can provide deep
insights into the microstructural origins of complex non-Newtonian flow
characteristics. Most studies in this vein have employed either homogenous shear flow,
or processing flows such as fiber spinning which are complicated by inhomogenous
deformation histories and/or nonisothermal operation. Here we present the design and
implementation of a new apparatus for in situ x-ray scattering studies of polymer
melts during homogenous uniaxial extensional flow. The experiment is based on the
commercially-available SER extensional flow fixture, which employs two counter-
rotating drums to deform a sample strip of polymer melt. This fixture has been
incorporated into a custom-fabricated convection oven designed to facilitate x-ray
access to the sample, and operation in a typical synchrotron beam line environment.
Preliminary data on extensional flow induced orientation of ordered block copolymers
will be used to illustrate the capabilities of this device.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2011.MAR.C1.84
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