EVA hot-melt adhesives: studying the influence of vinyl acetate content and tackifier nature on rheological, thermal and adhesion properties

摘要

Three EVA copolymers with different vinl acetate (VA) content (28 nto 40 wt. Percent) were mixed with rosin ester and terpene resin tackifiers in a 1:1 ratio. The addition of the rosin ester EVA produced a compatible mixture whereas for the terpene resin, an incompatible mixture was obtained. The increase in the VA content decreased the crystallinity of EVA and the elastic and viscous moduli also decreased, but the peel strength and the immediate adhesion increased.