Ph. Sung et Wg. Wu, GRAFT COPOLYMER NETWORKS OF POLYURETHANE AND EPOXY STRUCTURES .1. DYNAMIC-MECHANICAL PROPERTIES, European Polymer Journal, 30(8), 1994, pp. 905-909
The dynamic mechanical properties of polyurethane (PU) grafted epoxy p
olymer networks have been investigated. The glass transition region is
successfully broadened on variation of the degree of phase separation
. The tensile strength initially increases with increasing PU content
and reaches its maximum value when the PU/epoxy ratio is about 20/80.