Structure-Microhardness Relationship in Semi-interpenetrating Polymer Networks.

Autor:	CALLEJA, F.J. BALTÁ, PRIVALKO, E.G., FAINLEIB, A.M., SHANTALII, T.A., PRIVALKO, V.P.
Předmět:	MICROHARDNESS POLYMERS POLYURETHANES
Zdroj:	Journal of Macromolecular Science: Physics; Mar2000, Vol. 39 Issue 2, p131-141, 11p, 1 Chart
Abstrakt:	Two series of single-phase, semi-interpenetrating polymer networks (semi-IPNs) based on the same linear polyurethane (LPU) and two different heterocyclic polymer networks (HPNs), respectively, were characterized by the room temperature microhardness H measurement. It is shown that the H value linearly increases with both the mass content of the stiffer component (HPN) and the glass transition temperature of a semi-IPN. The latter dependence can be justified on the assumption that the excess enthalpy of the glass with respect to a hypothetical melt state is a measure of the yield strength of the glassy quasi lattice. [ABSTRACT FROM AUTHOR]
Databáze:	Complementary Index
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