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A Double-Tilt Small Angle Neutron Scattering Experiment on Deformed Poly Mer Systems

Published online by Cambridge University Press:  26 February 2011

R. F. Saraf ,
J. M. Lefebvre ,
R. S. Porter  and
G. D. Wignall
R. F. Saraf
Affiliation:
Polymer Science and Engineering, University of Massachusetts, Amherst MA 01003
J. M. Lefebvre
Affiliation:
Polymer Science and Engineering, University of Massachusetts, Amherst MA 01003
R. S. Porter
Affiliation:
Polymer Science and Engineering, University of Massachusetts, Amherst MA 01003
G. D. Wignall
Affiliation:
National Center for Small Angle Scattering Research, Oak-Ridge National Laboratory, Oak-Ridge TN 37830
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Abstract

A double rotation goniometer has been mounted in the neutron beam in order to characterize the molecular deformation in polymers subjected to various strain conditions.

The results provide a direct verification of the fiber symmetry in solid state coextruded polymethylmethacrylate (PMMA) and polypropylene (PP) homopolymers.

In the case of the shear banding phenomenon, we have been able to test the validity of the simple shear assumption: it also provides a direct estimate of the finite shear strain involved in the process. As a last illustration ofthe method, we also consider the biaxial deformation of PP and PMMA squeezed under various temperature and strain-rate conditions.

Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 79: Symposium F – Scattering, Deformation and Fracture in Polymers , 1986 , 263
Copyright
Copyright © Materials Research Society 1987

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References

[1] Sadler, D.M., Barham, P.J., J. Polymer Sci., Polym. Phys. 21, 309 (1983)Google Scholar
[2] Lefebvre, J.M., Escaig, B., Coulon, G. and Picot, C., Polymer 26, 1807 (1985)Google Scholar
[3] Hamzeh, F.M., Bragg, R.H., J. of Appl. Phys. 45, 3189 (1974)Google Scholar
[4] Saraf, R.F., Lefebvre, J.M., Porter, R.S. and Wignall, G.D., to be publishedGoogle Scholar
[5] Lefebvre, J.M., Porter, R.S. and Wignall, G.D., to appear in Polymer Eng. and Sci. (1987)Google Scholar
[6] Nicolas, A., Boudier, F. and Boullier, A.M., Amer. J. Sci. 273, 853 (1973)Google Scholar
[7] Saraf, R.F., Porter, R.S., to appear in J. of Rheology (1987).Google Scholar