SMP粒子強化SMPインテリジェントマテリアルの巨視的損失係数の解析

抄録

A loss factor of a polymeric material which influences its vibration damping capacity strongly is high in value nearby its glass transition temperature. Therefore, when the constituents of a polymer-based composite material are various in their glass transition temperatures, the magnitude of the macroscopic loss factor of such a composite may be expected to be high within wider range in temperature. In the present study, a shape memory polymer (SMP) particle/SMP matrix is used as a sample material and its macroscopic complex modulus and loss factor are derived explicitly by using the equivalent inclusion method combined with the Mori-Tanaka's theorem. Consequently, for the case of a five mode type of distribution of the glass transition temperature of particle whose aspect ratios is 0.01, the value of the macroscopic loss factor becomes higher than that of the monolithic SMP and it becomes constant within the temperature range from 30℃ to 70℃.