Real time x-ray rheology of polymers
- Univ. of Reading, Berkshire (United Kingdom)
- BP International Ltd., Sunbury-on-Thames, Middlesex (United Kingdom)
The ability to probe the structure of a polymer during deformation is of considerable technological interest as it lends an insight into the mechanisms involved in polymer processing. The behavior of Liquid Crystalline Polymers (LCP`s) during shear flow has generated much experimental interest by Virtue of their unusual behavior compared to that of simpler polymeric melts. The theory developed by Doi attempts to explain the observed phenomena in terms of considering interactions of rigid-rods. Exact solutions to the Doi theory have been compared to experimental procedures using lyotropic LCP systems. Although much of the available data relates to mechanical measurements, the comparisons with quantitative structural data can provide useful insight. Many different experimental techniques exist in polymer rheology. The dynamic properties of flowing polymer systems have been studied using: standard rheometers; NMR spectroscopy; fluorescence anisotropy; and rheo-optics. Here we present a rheometer used in conjunction with X-Ray scattering to provide in situ Theological measurements during deformation. X-Ray diffraction patterns provide information on the scale of 1-100 {Angstrom}: the scale of interest for molecular, intermolecular, and atomic polymer structure. X-Ray scattering techniques are also advantageous since X radiation penetrates polymer melts which may be opaque at optical wavelengths. In addition it is possible to distinguish between crystalline and amorphous scattering. 29 refs., 5 figs.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 369851
- Report Number(s):
- CONF-9408178--
- Journal Information:
- Advances in X-Ray Analysis, Journal Name: Advances in X-Ray Analysis Vol. 38; ISSN AXRAAA; ISSN 0376-0308
- Country of Publication:
- United States
- Language:
- English
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