抄録
Recently, thermo-setting plastic composites containing micro-balloons have been investigated frequently as a potential buoyant material for the ocean exploration. However, these investigations have been almost limited to their mechanical and physical properties. In view of the need for other properties, the following investigations have been undertaken.
Four kinds of composite materials were prepared by the vacuum infiltration method with epoxy resin as the matrix and glass, carbon, phenol or shirasu balloons as the filler. The relation between acoustic and mechanical properties was investigated under the soaking condition in water.
The results showed that the composite with carbon balloons is much better than others from the view point of its smallest acoustic transmission loss and smallest decrement of mechanical properties under the soaking condition in water.
