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A Study of Changes in Poly(Methyl Methacrylate) (pMMA) Resulting from the Adsorption of Methanol using NMR Imaging

Published online by Cambridge University Press:  21 February 2011

Norbert Schuff ,
Phillip A. Hornung  and
Evan H. Williams
Norbert Schuff
Affiliation:
Varian Associates Nuclear Magnetic Resonance Instruments, 3120 Hansen Way, Palo Alto CA 94304, USA
Phillip A. Hornung
Affiliation:
Varian Associates Nuclear Magnetic Resonance Instruments, 3120 Hansen Way, Palo Alto CA 94304, USA
Evan H. Williams
Affiliation:
Varian Associates Nuclear Magnetic Resonance Instruments, 3120 Hansen Way, Palo Alto CA 94304, USA
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Abstract

The understanding of the adsorption of solvents into materials is of great interest in different fields of material science. NMR imaging techniques can be used to follow the process of solvent adsorption by obtaining spatial and chemical information in a nondestructive way. We report here a study of the uptake of methanol (a non-solvent) into poly(methyl methacrylate) beads produced by suspension polymerization and into compression mouldings. In both cases, the uptake is far faster than the rate of diffusion measured elsewhere. We also illustrate the nonreversible nature of this uptake with respect to temperature cycling.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 217: Symposium U – Advanced Tomographic Imaging Methods for the Analysis of Materials , 1990 , 55
Copyright
Copyright © Materials Research Society 1991

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References

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