Abstract
Injection-moulded specimens made of linear polyethylene with preferred orientation of the molecular chains (c-axes) in the direction of injection were deformed in a bending test. Ultra-thin sections of the deformed material were made following chlorosulfonization. Examination using transmission electron microscopy revealed that deformational and superstructural elements can be elucidated simultaneously using this method. Deformation in the observed regions with multiple kink bands is found to be inhomogeneous and concentrated in two shearing processes: one along the borders of the kink band and the other within a kink band at an acute angle to the border of the band. It must be concluded from the formation of the lamellae in the kink bands that deformation, even within a kink band, is inhomogeneous and is predominantly concentrated in the shear zones, while the lamellar stacks lying between the shear zones appear under electron microscopy, to be nearly undeformed.
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