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Sheaf-like arrangement of lamellae in a blend of polyethylenes

By University of Cambridge DoITPoMS and Bristol University Polymer Physics Group Dr P J Barham


A replica of a 3:1 blend of linear with lightly branched polyethylenes (BPE has 26 branched per 1000 backbone carbon atoms) after isothermal crystallisation at a temperature at which the LPE but not the BPE can crystallise. This sample crystallised from a phase separated melt. There are clearly two lamellar types (The isothermal crystallisation makes the distinction clearer). The thick, LPE rich, lamellae crystallised in sheaf-like groups, from LPE rich droplets contained in a BPE rich matrix. The sheaf-like arrangement is representative of one of the initial stages in spherulite formation.

Topics: alignment, blend, polyethylene (pe), polymer, quenching, spherulite, doitpoms, university of cambridge, micrograph, corematerials, ukoer, Engineering, H000
Publisher: Bristol University
Year: 2010
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Provided by: Jorum Open
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