Plastic Deformation of Semicrystalline Polyethylene by X-ray Scattering: Comparison with Atomistic Simulations

Autor:	Andy H. Tsou, Sanghun Lee, Gregory C. Rutledge, Justin Che, Benjamin S. Hsiao, C. Rebecca Locker
Rok vydání:	2013
Předmět:	Materials science Polymers and Plastics Scattering Organic Chemistry Strain rate Polyethylene Inorganic Chemistry chemistry.chemical_compound chemistry Cavitation Ultimate tensile strength Materials Chemistry Lamellar structure Fiber Composite material Deformation (engineering)
Zdroj:	Macromolecules. 46:5279-5289
ISSN:	1520-5835 0024-9297
DOI:	10.1021/ma4005007
Popis:	Plastic deformation of uniaxially oriented polyethylene (PE) fiber has been examined by small and wide angle synchrotron X-ray scattering. Morphology changes of the lamellar stack with deformation beyond yielding have been characterized and quantified. Atomistic simulations of tensile deformation of the lamellar stack in the longitudinal direction compare favorably to the experimentally observed morphological changes in the PE fiber. Experimental deformations at 100 °C exhibit responses comparable to those observed by simulation of deformation with constant total volume at 77 °C and a strain rate of 5 × 106 s–1. Experimental deformations of the PE fiber at 25 °C were found to be comparable to simulated tensile deformation with constant lateral dimensions at 77 °C and a strain rate of 5 × 107 s–1. Cavitation in the interlamellar region was found experimentally in the PE fiber deforming at room temperature as predicted by simulation with constant lateral dimensions at the higher strain rate. Melting, recrys...
Databáze:	OpenAIRE
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