Processing-Structure-Property Relations in Novel Organocement Composites

Desai, Priyadarshi Gautam

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Description

Title

Processing-Structure-Property Relations in Novel Organocement Composites

Author(s)

Desai, Priyadarshi Gautam

Issue Date

1997

Doctoral Committee Chair(s)

Lewis, Jennifer A.

Department of Study

Materials Science and Engineering

Discipline

Materials Science and Engineering

Degree Granting Institution

University of Illinois at Urbana-Champaign

Degree Name

Ph.D.

Degree Level

Dissertation

Keyword(s)

Engineering, Materials Science

Language

eng

Abstract

The following hypothesis was developed on the basis of experimental observations of Al$\sb2$O$\sb3$-substituted organocement composites. Moisture absorption and transport occurs through the bulk polymer regions; this process combined with further hydration of unreacted cement grains promotes property degradation. Processing constraints prevented complete reduction of the unreacted cement phase in the Al$\sb2$O$\sb3$-substituted composites. Hence, organocement composites with tailored microstructures derived from CaAl$\sb2$O$\sb4$-coated Al$\sb2$O$\sb3$ microcomposite powders were fabricated. These composites contained a negligible amount of unreacted CaAl$\sb2$O$\sb4$ and a moderate reduction in bulk polymer content and exhibited initial strengths comparable to those reported for conventional organocements. These composites did not exhibit significant improvement in moisture sensitivity. Hence, degradation effects stemming from the presence of unreacted cement appeared to be of secondary importance to controlling the moisture sensitivity of these composites.

Graduation Semester

1997

Type of Resource

text

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