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Processing, structure and properties of oriented polymers
Author(s) -
Ward Ian M
Publication year - 1988
Publication title -
makromolekulare chemie. macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 0258-0322
DOI - 10.1002/masy.19880220106
Subject(s) - extrusion , materials science , polymer , composite material , thermotropic crystal , ultimate tensile strength , solubility , liquid crystalline , chemistry , organic chemistry
The fabrication techniques now available for the production of highly oriented polymers are reviewed. These techniques include tensile drawing from both melt‐spun and gel‐spun polymers, extrusion under pressure from the melt, and hydrostatic extrusion, ram extrusion and die drawing in the solid phase. In addition, lyotropic and thermotropic liquid crystalline polymers offer new routes to very stiff and strong polymers. Following the review of processing methods, an account is given of low strain mechanical behaviour and its relationship to structure, thermal properties (including thermal conductivity and thermal expansion behaviour) and barrier properties (permeability to liquids and gases and solubility).