フエノール樹脂-ポリビニルブチラール混合塗膜の粘弾性(第1報)

抄録

A study on viscoelastic properties of phenol resin-polyvinyl butyral (PVB) mixed films has been made over a wide temperature range by means of the vibrating reed method and dielectric method.
Two mechanical dispersions due to PVB mixed in the film can be easily observed; these dis-persions are influenced by the baking condition, the ratio of PVB to phenol resin and the types of both resins.
From the relation between the magnitude of these dispersions and PVB content in the film, it seems most reasonable to conclude that one of these dispersions is due to the second order transi-tion of PVB itself and the other one to the existence of some graft or network structure which is formed by chemical reaction between PVB and phenol resin during baking process.
A model to explain the dispersed state of the mixture is proposed from the results of measure-ments on the mechanical and dielectric properties of the films.