Shearing Loss Tangent of Thermosetting Polyurethane Elastomers Pasted Bonding Tape Made of Acryl Foam

For evaluation of shearing loss tangent of thermosetting polyurethane elastomers pasted bonding tape made by acryl foam were investigated by dynamic viscoelastic measurements. Loss tangent of two layer type sample is among the loss tangent of thermosetting polyurethane elastomers and the loss tangent of bonding tape made by acryl foam. The larger the thickness of bonding tape or the larger the storage modulus of the thermosetting polyurethane elastomers, the loss tangent of compound model type sample in normal temperature become to be larger. The larger the difference of the storage shearing modulus of thermosetting polyurethane elastomers and adhesive on surface of bonding tape, the loss tangent of compound model type sample may be larger by the hystereisis of the shearing deformation.