Image icon  Lamellar structure of spherulite

 
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Description: This is a schematic image showing (a) zig-zag conformation of high-density polyethylene (HDPE), with stacking in crystal; (b) chain folded model for HDPE in lamella; (c) dimensions of HDPE single crystal showing non-crystalline tie molecules. By cooling solutions of polymers in organic solvents, it is possible to obtain minute platelets (lamellae) which represent the smallest crystal elements within much more complex structures like spherulites . Such lamellae vary in thickness between 10 and 40 nm and may be several micrometres (μm) wide.
Keywords: PE • polyethylene • morphology • spherulite • crystalline • structure • zig-zag • chain • lamellae • non-crystalline • composite • image
Categories: Science approaches > Structure, bonding & defects > Crystal structure
Materials > Hybrids > Composites
Materials > Polymers & elastomers
Materials > Polymers & elastomers > Plastics
Materials > Polymers & elastomers > Plastics > Thermoplastics > Polyethylene (PE)
Scale > Micro
Created by: The Open University
Published by: The Open University
License: This resource is released under the Creative Commons Attribution Non-Commercial Share Alike license (2.0 UK: England & Wales).
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Date created: 09 March 1998
Date added: 14 December 2010
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Resource ID: 3294