Intracrystalline Dynamics in Oligomer‐Diluted Poly(Ethylene Oxide). Issue 1 (26th November 2019)

• Record Type: Journal Article
• Authors: Schäfer, Mareen; Wallstein, Niklas; Schulz, Martha; Thurn‐Albrecht, Thomas; Saalwächter, Kay
• Other Names: Schubert Ulrich S. guestEditor.
• Is Part Of: Macromolecular chemistry and physics. Volume 221:Issue 1(2020)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-11-26
• Subjects: intracrystalline dynamics -- oligomer‐dilution -- poly(ethylene oxide) -- semicrystalline polymers; Polymers -- Periodicals; Polymerization -- Periodicals; Synthetic products -- Periodicals; Macromolecules -- Periodicals; 547.7
• DOI: 10.1002/macp.201900393
• Languages: English
• ISSNs: 1022-1352

Abstract

Abstract: 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‐ M w 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. Abstract : 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.