Yasuhiro Morimura

Sound damping materials

A sound damping material is disclosed, which is a composite structural body comprising honeycomb or corrugated core, plain sheet and pressure sensitive adhesive layer, a height direction of the honeycomb or corrugated core being perpendicular to a surface of a vibrating body. In this sound damping material, one pressure sensitive adhesive layer is at least existent between the honeycomb or corrugated cores or between the honeycomb or corrugated core and the plain sheet.

Modification of polymer in the liquid crystal/polymer complex film

Several kinds of polymers for liquid crystal/polymer complex film (LC/P film) and their modifications had been examined in order to improve their thermal stabilities and mechanical durabilities. Crosslinked rubbery resin; modified poly butadiene, was found to be one of the suitable materials as matrix polymer. The matrix of polymethyl methacrylate, with which satisfactory optical property was available, showed poor thermal stability. The addition of multi-functional monomers which introduced crosslinking structure to the polymer was slightly effective to improve the thermal stabilities, while the matrix of modified polyamide shown inferior optical properties in spite of its desirable stabilities.