Abstract
Recent studies at the University of Detroit Mercy, Polymer Technologies, Inc. on the ability of interpenetrating polymer networks (1PN) to absorb mechanical and acoustical energy are reviewed.
Polyurethane/poly(vinyl chloride) pseudo-IPN elastomers, polyurethane/ poly (vinyl ester) IPN foams and polyurethane/epoxy/unsaturated polyester two-and three-component IPN foams and elastomers were studied by dynamic mechanical spectroscopy (DMS), sound absorption properties (impedance tube technique), compressive hysteresis, resilience (ball rebound) and other measurements. The IPN systems were tailored to possess broad and high glass transitions and the effect of their broad viscoelastic region on the energy absorbing properties were determined.
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