Abstract
SUFFICIENTLY concentrated aqueous solutions of polymethacrylic acid (about 8–15 per cent, depending on the degree of polymerization) form clear stiff gels at room temperature. At somewhat lower concentration, such systems are sols. On heating, these sols can be converted into gels; on cooling, the gelation is completely reversible, the gels reverting to sols which reach their original consistency after about an hour.
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ELIASSAF, J., SILBERBERG, A. & KATCHALSKY, A. Negative Thixotropy of Aqueous Solutions of Polymethacrylic Acid. Nature 176, 1119 (1955). https://doi.org/10.1038/1761119a0
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DOI: https://doi.org/10.1038/1761119a0
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