Intracrystalline Dynamics in Oligomer‐Diluted Poly(Ethylene Oxide)

Solid‐state creep, ductility, and drawability are relevant mechanical properties of “crystal‐mobile” polymers, related to a large‐scale chain transport through the crystal, which is in turn mediated by intracrystalline monomer jumps. Here, high‐Mw poly(ethylene oxide) is used as a well‐controlled mo...

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Bibliographic Details
Published in:Macromolecular chemistry and physics 2020-01, Vol.221 (1), p.n/a
Main Authors: Schäfer, Mareen, Wallstein, Niklas, Schulz, Martha, Thurn‐Albrecht, Thomas, Saalwächter, Kay
Format: Article
Language:English
Subjects:
Creep (materials)
Crystallization
Dilution
Drawability
Ethylene oxide
intracrystalline dynamics
Mechanical properties
oligomer‐dilution
poly(ethylene oxide)
Polyethylene oxide
semicrystalline polymers
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Summary:Solid‐state creep, ductility, and drawability are relevant mechanical properties of “crystal‐mobile” polymers, related to a large‐scale chain transport through the crystal, which is in turn mediated by intracrystalline monomer jumps. Here, high‐Mw poly(ethylene oxide) is used as a well‐controlled model system, modulating the properties of the amorphous phase by diluting with a non‐crystallized oligomer. Faster intracrystalline motions are found upon oligomer addition, indicating little changes in the fold surface and a dominant influence of the somewhat reduced lamellar thickness. The amorphous‐phase properties of the crystal‐mobile polymer poly(ethylene oxide) are modified by diluting with a non‐crystallizing oligomer. Upon dilution, the overall crystallinity of the samples decreases significantly, while the thickness of the crystalline lamellae only shows a slight decrease. The faster helical‐jump motions for thinner crystals suggests a marginal influence on or of the defect generation in the fold surface.
ISSN:1022-1352
1521-3935
DOI:10.1002/macp.201900393