ISSN:
0098-1273
Keywords:
Physics
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
The thermoelastic behavior of poly(vinyl alcohol)-poly(acrylic acid) networks was evaluated in pure water and CaCl2 solution. The ratio fe/f of the energy component of the force to the total force, evaluated without taking into account polymer-diluent specific interactions, ranged from -0.75 for networks swollen in pure water to -5.7 in 0.1M CaCl2. However, an analysis based on Flory's theory of polyelectrolyte gels yields fe/f constant at -1.32 when specific interactions are accounted for. In addition, the variation of In (r2)0 with CaCl2 concentration is 2000 times that with water. In neither pure water nor CaCl2 solution can specific interactions be neglected.
Additional Material:
7 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pol.1974.180120102
Permalink