DYNAMIC-MECHANICAL PROPERTIES OF INTERPENETRATING POLYMER NETWORKS BASED ON POLYACRYLATES AND EPOXY

Interpenetrating polymer networks (IPNs) based on polyacrylate (poly(p olyethylene glycol diacrylate), PEGDA) and epoxy(diglycidyl ether of b isphenol A, DGEBA) were prepared simultaneously Dynamic mechanical pro perties of the SINs (simultaneous interpenetrating networks) with vari ous compositions were studied. Enhanced mechanical properties were fou nd in this case. From the point of view of pre-swollen networks, all o f the PEGDA/DGEBA IPNs were composed of the individual pre-swollen net works. A micro-phase segregation system was produced in the SIN. Glass transition temperatures shifted inward, which was attributed to molec ular packing effects or mutual-entanglements of molecular segments amo ng the individual pre-swollen networks. In accordance with the additiv ity of properties, namely the parallel model, the entanglement density between the two polymer networks reached its maximum at 50/50 PEGDA/D GEBA IPN.