Wiley InterScience Backfile Collection 1832-2000
Chemistry and Pharmacology
In matrix reactions in swellable cellular matrixes, the solids formed are oriented in space and arranged in the form of cells in strong three-dimensional growth processes. Open-cell, flexible, elastic polyurethanes have a particularly good matrix action. The principle is of general validity, and can be realized with a wide variety of matrixes and reaction types. The dimensional changes, which are always symmetrical, are largely determined by the chemical constitution of the matrix, segment structure, degree of crosslinking, and solvation and hydration behavior. One-component reactions having high rates give sigmoid growth curves and exhibit parallels with growth curves of plant cell walls containing cellulose.
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