抄録
Acoustic properties, i.e., acoustic impedance, sound velocity, etc., are useful for characterizing polymer materials. It has been reported that the acoustic properties of thin polymer films can be measured by utilizing acoustic resonance phenomenon occurring at the water/polymer film/reflection plate interface. We use a transparent glass plate as a reflection plate and the acoustic properties of the LLDPE films are measured together with getting the optical microscope images at the corresponding area.
