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Solid Polymers Doped with Neodymium. Complex Formation and Morphology in NdCl3 and Nd(DPM)3-Poly(Ethylene Oxide) Systems

Published online by Cambridge University Press:  28 February 2011

Conor J. Twomey and
Shaw H. Chen
Conor J. Twomey
Affiliation:
Department of Chemical Engineering and Laboratory for Laser Energetics, University of Rochester, Rochester, NY 14627
Shaw H. Chen
Affiliation:
Department of Chemical Engineering and Laboratory for Laser Energetics, University of Rochester, Rochester, NY 14627
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Abstract

The complex formation and morphology of the NdCI3—PEO system are presented together with some preliminary results on the Nd(DPM)3 \Nd—tris—2,2,6,6—tetramethyl —3,5—heptane dionate]—PEO system. Although the NdCl3—PEO complex is found to be highly hygroscopic, it is shown that residual moisture can be removed reversibly, thereby permitting the role of water in affecting the morphology of the solid to be examined. It is concluded that complexation is a competitive process between the ether oxygens on the polymer backbone and water. Under anhydrous conditions the resultant complex is amorphous at a \EO]/\NdCl3] molar ratio approximately less than ca. 8, but above this critical value the PEO in excess of the stoichiometric ratio presents a second partially crystalline phase. The glass transition temperatures were found to increase sigmoidally with increasing salt content. Despite the hygroscopic nature of Nd(DPM)3 the resultant complexes were found to be moisture resistant upon prolonged exposure to the atmosphere.

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Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 210: Symposium L – Solid State Ionics II , 1990, 279
Copyright
Copyright © Materials Research Society 1991

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