By Alan D. Wilson;John W. Nicholson
There was a failure to acknowledge acid-base cements as a unmarried, well-defined category of fabric. This e-book makes an attempt to therapy this example by means of unifying the topic and treating this variety of fabrics as a unmarried category. Following a short ancient assessment, an introductory bankruptcy defines those cements as fabrics which are shaped by way of reacting a simple powder with an acidic liquid to yield a salt-like matrix. the character of the cementation procedure and the cement-forming acids and bases are mentioned. different chapters are dedicated to the equipment of research, the constitution of water and straightforward polyelectrolyte conception.
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Additional resources for Acid-Base Cements: Their Biomedical and Industrial Applications (Chemistry of Solid State Materials)
Cady, H. P. & Elsey, H. M. (1922). A general conception of acids, bases and salts. Science, 56, 27 (Lecture abstract). Cady, H. P. & Elsey, H. M. (1928). A general definition of acids, bases and salts. Journal of Chemical Education, 5, 1425-8. 26 References Cartledge, G. H. (1928a). Studies on the periodic system. I. The ionic potential as a periodic function. Journal of the American Chemical Society, 50, 2855-63. Cartledge, G. H. (1928b). Studies on the periodic system. II. The ionic potential and related properties.
According to Yatsimirskii, group (2) and (3) species are equivalent to Pearson's hard acids and bases, and group (4), (5) and (6) species correspond to Pearson's soft acids and bases. This classification is of more value than HSAB theory to our subject. It can be seen that all cementforming anions come from group (3) and cations from groups (3), (4) and (5). Thus, the bonding in cement matrices formed from cation-anion combinations is not purely a but contains some n character. , Chatt, J. & Davies, N.
Water may have a number of roles in the set versions of these cements. It is capable of solvating the cement-forming ions, such as Ca2+ or Zn2+, depending on the cement. It also contributes a sheath of solvating molecules around polyelectrolytes such as poly(acrylic acid) in glassionomer and zinc polycarboxylate cements. Significant amounts of water are known to be retained by metal polyacrylate salts at equilibrium and this water contributes to reducing the glass transition temperature of such materials by acting as a plasticizer (Yokoyama & Hiraoko, 1979).
Acid-Base Cements: Their Biomedical and Industrial Applications (Chemistry of Solid State Materials) by Alan D. Wilson;John W. Nicholson