Abstract
The influence of poly(acrylic acid), PAA molar mass, concentration and glass volume fraction were investigated on the compressive strength of polyalkenoate cements after ageing for 1, 7 and 28 days in water at 37°C. The compressive strength increased with the molar mass of the polyacid. The increase in compressive strength with molar mass was greater at higher PAA concentrations. Increasing the polyacid concentration generally increased the compressive strength, until PAA concentrations greater than 50% m/m were achieved. Increasing the glass volume fraction had little influence on the compressive strength of cements made with low PAA concentrations, however the compressive strength increased with glass volume fraction for cements that had a high PAA concentration. Increasing the ageing time of the cement prior to testing generally resulted in an increase in compressive strength. However the influence of ageing time was greater in cements made with high PAA concentrations.
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Fennell, B., Hill, R.G. The influence of poly(acrylic acid) molar mass and concentration on the properties of polyalkenoate cements Part I Compressive strength. Journal of Materials Science 36, 5193–5202 (2001). https://doi.org/10.1023/A:1012445928805
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DOI: https://doi.org/10.1023/A:1012445928805