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Direct Observation of Dislocation Networks in Folded‐Chain Crystals of Polyethylene

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2 Author(s)
Holland, V.F. ; Chemstrand Research Center, Inc., Durham, North Carolina ; Lindenmeyer, P.H.

Your organization might have access to this article on the publisher's site. To check, click on this link:http://dx.doi.org/+10.1063/1.1702926 

The direct observation of networks of dislocations between platelets of folded‐chain polyethylene crystals has been accomplished using diffraction contrast electron microscopy. The networks are composed of dislocations, primarily in their screw orientation, having Burgers vectors [110], [100], and [010]. The [110] dislocations are invariably dissociated into ribbons and there is evidence that the other two also tend to dissociate. Singularities in the networks are interpreted in terms of interactions between the partial edge dislocations previously detected by moiré patterns and glissile screw dislocation ribbons. These observations prove that folded‐chain surfaces are sufficiently regular to pack crystallographically and that slip between folded‐chain platelets can occur by the motion of dislocations.

Published in:

Journal of Applied Physics  (Volume:36 ,  Issue: 10 )

Date of Publication:

Oct 1965

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