Influence of Chemical composition of Ethylene-Vinyl Acetate Copolymers on Impact Noise Damping of Composites

에틸렌-초산비닐 공중합체의 공중합 조성이 복합체의 충격음 흡수성능에 미치는 영향

  • 이현종 (강원대학교 산림과학대학 임산공학과)
  • Published : 1999.09.01

Abstract

This study was carried out to investigate the influence of viscoelastic properties(or chemical composition) of a series of ethylen-viny1 acetate copolymers on impact noise and vibration damping of wood/polymer/wood sandwich composites. The impact noise and vibration damping of composites were very sensitive to the state of molecular motion of polymer. The noise and vibration damping of composites were maximum when the polymer was under the glass transition(vinylacetate 55~75%) at the test-temperature, and minimum rubbery state(vinyl-acetate 47~20%) or glassy state(vinylacetate 100~87%). The polymer under glass transition reduced the impact noise by 6~12 dB.