Vibration and Impact Noise Damping Properties of Wood/Polymer Composites
This study investigates the influence of viscoelastic properties of a series of ethylene-vinyl acetate copolymer on impact noise and vibration damping of wood/polymer/wood sandwich composites. It was found that the impact noise and vibration damping of composites are very sensitive to the state of molecular motion of polymer. The noise and vibration damping of composites was better when the polymer was in the glass transition state (vinyl acetate 55~75%) at the test-temperature, and it was worse when the polymer was in rubbery state (vinyl acetate 47~20%) or in glassy state (vinyl acetate100~87%). The impact noise decreased by about 6-12dB when the glass transition state of polymer was sandwiched between wood panels.
Hyung Sun Kim, Sang-Yeop Park, Bo Young Hur and Soo Wohn Lee
H. J. Lee et al., "Vibration and Impact Noise Damping Properties of Wood/Polymer Composites ", Materials Science Forum, Vols. 486-487, pp. 358-361, 2005