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Gypsum polymer composites 2008
1. A Study on Constitution and Properties of Gypsum-Polymer Composites Author: Hesham Abdel Rehim, MSc. Supervisor: Assoc. Prof., RNDr. Ondrej Gedeon, Ph.D.
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3. Dehydration: CaSO 4 .2H 2 O + Energy -> CaSO 4 .½H 2 O + 1½ H 2 O CaSO 4 .½H 2 O + Energy -> -CaSO 4 + ½H 2 O Gypsum Technology Rehydration: CaSO 4 .½ H 2 O+ 1½H 2 O -> CaSO 4 .2H 2 O + Energy
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6. Vinyl-based polymers PVA P(VA-co-VAc-co-It) P(VC-co-VAc-co-VA) [ CH 2 CH ] n OH CH 2 COOH [ CH 2 CH ] x [ CH 2 CH ] y [ CH 2 C ] z OH COOCH 3 COOH [ CH 2 CH ] x [ CH 2 CH ] y [ CH 2 CH ] z Cl COOCH 3 OH
7. 1. Assessment of the starting materials (Plaster & polymers). 2. Formation of different polymer/plaster composites. 3. Measuring of the mechanical properties. 4. Correlation with the microstructure. 5. Studying of the bioactivity of gypsum and gypsum- polymer composites. Experimental Work
22. Bioactivity of Gypsum and Gypsum-Polymer Composites Variations in the pH of SBF solutions
23. Bioactivity of Gypsum and Gypsum-Polymer Composites Neat plaster Gypsum after treatment in SBF followed by 1.5 SBF for a week (Low Magnification) Gypsum after treatment in SBF followed by 1.5 SBF for a week ( High Magnification ) Energy-dispersive x-ray analysis of the spot marked by X in micrograph (c).
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30. - Onderj Gedeon Doc.RNDr., Ph.D. - Ale š Helebrant Doc. Ing., CSc. - Jana Andertová Ing., CSc. - Jan Macháček Ing., Ph.D. - Dana Rohanová Dr. Ing. Acknowledgement