Single-lap joint creep behaviour of two soft adhesives

Two hot melt pressure sensitive adhesives have been submitted to bonded joint creep tests. An amorphous and a semicrystalline considered for their different microstructures leading mechanical behaviors. The are referred as soft since glass transition temperatures stand well below the of applications, resulting in low stiffnesses. structural joints has characterized with single-lap types adherends were either or stainless steel. adherend roughness adhesive wettability before testing. significant stiffness contrast between stiff promoted homogeneous simple shear creeps. showed behaviors that depend on type substrates, showing viscoelasticity could not be predicted knowing bulk only, unlike recently reported literature. Finally, both same compared discussed at light inducing