Effects of Orientation and Drawing

Pscudoequilibrium Young s modulus parallel ( o) and perpendicular ( 90) to draw direction for cold-drawn sheets of low-density polyethylene, at — 125 C. (Gupta and Ward. ) Reproduced by permission, from Reference 105, p. 382, by courtesy of Marcel Dekker, Inc. 

Propagation of shear and longitudinal waves through oriented polymers in various directions with respect to the direction of stretch also yields important information 

Effects of orientation are observed in various other physical properties, and can aid in identification and interpretation of the time-dependent mechanical 

Fig 16-24. Storage and loss tensile moduli at 110 Hz plotted against temperature, parallel and perpendicular to the draw direction, for linear polyethylene drawn fivefold at 38°C with no subsequent annealing. (Takayanagi, 2) 

Polymer Single Crystals, Interscience, New York, 1963. 

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