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On the morphology of polyethylene crystallised from a sheared melt

Hosier, I.L., Bassett, D.C. and Moneva, I.T. (1995) On the morphology of polyethylene crystallised from a sheared melt Polymer, 36, (22), pp. 4197-4202.

Record type: Article


The morphology of linear polyethylene, crystallized from a sheared melt in the form of shish-kebabs, has been investigated by transmission electron microscopy following permanganic etching. The microstructure of lamellae crystallized transversely on a central linear thread changes systematically with crystallization temperature and shear rate. Higher strain rate produces more and longer filaments and aligns lamellar normals along their rows. At lower strain rate, lamellar habits resemble, but differ from, those characteristic of quiescent growth. Fold surfaces that are inclined to the chain axis c at lower shear rates become normal to c with higher shear, thereby adopting a state of higher energy. It is inferred from this and the high crystallization temperatures that their crystallization was not strain-free. The separation of adjacent lamellae and its decrease at higher strain rate are consistent with pressure from molecular cilia emerging from fold surfaces, in a similar way to the basic cause of lamellar divergence in spherulites.

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Published date: October 1995
Organisations: Electronics & Computer Science, EEE


Local EPrints ID: 265730
ISSN: 0032-3861
PURE UUID: 9b6003e7-8135-49bf-820a-2281319af09c
ORCID for I.L. Hosier: ORCID iD

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Date deposited: 16 May 2008 13:20
Last modified: 18 Jul 2017 07:23

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Author: I.L. Hosier ORCID iD
Author: D.C. Bassett
Author: I.T. Moneva

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