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25 September 2000 Plastic deformation of crystalline polymer blends studied by x-ray techniques
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Proceedings Volume 4240, X-Ray Investigations of Polymer Structures II; (2000)
Event: X-Ray Investigations of Polymer Structures, 1999, Szczyrk, Poland
Plastic deformation of several blends including PE/PS, PE/SEBS/PS, PA6/PP-g-AA and iPP/HOCP, and resulting textures were studied using X- ray pole figures technique. The primary deformation mode chosen for this study was plane-strain compression in channel-die. Deformation in this mode is not accompanied by cavitation, which allows high strain deformation and helps to identify the deformation mechanisms active. It was found that the basic mechanisms of plastic deformation are crystallographic slips within lamellae supported by plastic shear and flow of amorphous component (intralamellar sliding). The mechanism identified are basically the same as those active in deformation of plain polymers. In phase separated blends interfaces between components do not cavitate and preserve their integrity in either uncompatibilzed or compatibilized blends. The inclusions of the second component influence the plastic deformation of the crystalline matrix by local modification of the stress field in their surroundings. That modification depends on the ratio of compliances of the inclusions and the matrix at the temperature of deformation.
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Z. Bartczak and Andrzej Galeski "Plastic deformation of crystalline polymer blends studied by x-ray techniques", Proc. SPIE 4240, X-Ray Investigations of Polymer Structures II, (25 September 2000);


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