Dielectric Study of Relaxation Behaviour of semi-Interpenetrating Polymer Networks based on Polyurethane and Poly(2-hydroxyethyl methacrylate).

The study of dielectric properties and molecular dynamics in Polyurethane (PU), Poly(hydroxyethyl methacrylate) (PHEMA) and in semi-IPNs based on PU and PHEMA synthesized by photopolymerization are presented. The results of broadband dielectric spectroscopy (BDS) investigation are compared with results of investigation by dynamic mechanical analysis(DMA) with the goal to have a better insight on the dynamic of the chain and their relation with the structure. The relaxation maps for investigated PU, PHEMA and semi-IPNs were built. [ABSTRACT FROM AUTHOR]