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Polymer-Clay Nanocomposite Materials: Solution and Bulk Properties

Published online by Cambridge University Press:  21 March 2011

Gudrun Schmidt ,
Alan I. Nakatani ,
Paul D. Butler ,
Vincent Ferreiro ,
Alamgir -Karim  and
Charles C. Han
Gudrun Schmidt
Affiliation:
Polymers Division and Center for Neutron Research National Institute of Standards and Technology, Gaithersburg, Maryland 20899
Alan I. Nakatani
Affiliation:
Polymers Division and Center for Neutron Research National Institute of Standards and Technology, Gaithersburg, Maryland 20899
Paul D. Butler
Affiliation:
Polymers Division and Center for Neutron Research National Institute of Standards and Technology, Gaithersburg, Maryland 20899
Vincent Ferreiro
Affiliation:
Polymers Division and Center for Neutron Research National Institute of Standards and Technology, Gaithersburg, Maryland 20899
Alamgir -Karim
Affiliation:
Polymers Division and Center for Neutron Research National Institute of Standards and Technology, Gaithersburg, Maryland 20899
Charles C. Han
Affiliation:
Polymers Division and Center for Neutron Research National Institute of Standards and Technology, Gaithersburg, Maryland 20899
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Abstract

The influence of shear on viscoelastic polymer-clay solutions was investigated by means of small-angle neutron scattering (SANS) under shear. SANS measured the shearinduced orientation of polymer and platelets. With increasing shear rate an anisotropic scattering pattern developed. At higher shear rates, the scattering anisotropy increases due to the increased orientation of the clay platelets in the shear field. Cessation of shear leads to fast recovery demonstrating the system to be highly elastic. As a result of drying, these solutions produce translucent nanocomposite films with a microporous membrane character. Depending on the preparation and degree of polymer-clay film dispersion, it is possible to modify the morphology and elastic properties of nanocomposite materials. Atomic Force Microscopy (AFM) reveals the network character and the development of morphology as a function of polymer concentration. Preliminary SANS experiments on the films will be correlated to morphologies obtained from AFM.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 661: Symposium KK – Filled & Nanocomposite Polymer Materials , 2000 , KK5.10
Copyright
Copyright © Materials Research Society 2001

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References

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