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A Study of the Thermolysis Behaviour of Pmma in Polymer/SiO2-PbO-B2O3 Glass Powder Mixtures

Published online by Cambridge University Press:  25 February 2011

A. Aruchamy ,
K. A. Blackmore ,
B. J. J. Zelinski ,
D. R. Uhlmann  and
C. Booth
A. Aruchamy
Affiliation:
Department of Materials Science and Engineering, University of Arizona, Tucson, AZ-85712
K. A. Blackmore
Affiliation:
Department of Materials Science and Engineering, University of Arizona, Tucson, AZ-85712
B. J. J. Zelinski
Affiliation:
Department of Materials Science and Engineering, University of Arizona, Tucson, AZ-85712
D. R. Uhlmann
Affiliation:
Department of Materials Science and Engineering, University of Arizona, Tucson, AZ-85712
C. Booth
Affiliation:
Experimental Station, E.I. du Pont de Nemours & Co., Wilmington, DE-19898
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Abstract

The binder burn-out behavior in PMMA/glass powder composites was studied as a function of glass composition in the PbO-SiO2-B203 system. The PbO content was varied to obtain glasses having optical basicities in the range of 0.62-0.81. TGA measurements on PMMA/glass composites show that the main decomposition end temperatures of PMMA increase with decreasing PbO content, and therefore, decreasing optical basicity. This indicates that PMMA interacts strongly with more acidic surfaces. The effect of the milling fluid was also studied. Milling in toluene does not significantly alter the behavior. Milling in water of a PbO-rich glass leads to significant leaching of lead. During drying, the leached lead deposits on the glass particle surfaces and drastically alters the thermal behaviour of the glass powder and PMMA/glass composites.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 249: Symposium Q – Synthesis and Processing of Ceramics: Scientific Issues , 1991 , 353
Copyright
Copyright © Materials Research Society 1992

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References

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