Abstract
The effect of cold drawing on monofilament Polypropylene sutures PP at room temperature 24 °C were studied interferometrically. The changes in the molecular orientation were evaluated to obtain optical and mechanical orientation factors f 2(θ), f 4(θ), f 6(θ), P 2(cosθ), P 4(cosθ), crystalline and amorphous orientation functions F c and F a, respectively. The shrinkage factors, the reduced stress and the number of chains between cross links per unit volume were determined. Calculation of the cross link density (N 0) and the chain entanglement density (N c) with the aid of Moony–Rivlin equation constants were given. Also, other various different opto-mechanical parameters were calculated. Relations between the optical and mechanical parameters were given. The present study demonstrates changes in the different orientation factors and structural parameters. Illustrations were given using curves and microinterferograms.
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