title: Segmental Mobility in the Non-crystalline Regions of Semicrystalline Polymers and its Implications on Melting.
abstract: Detailed knowledge on chain mobility in polymers is of fundamental interest in order to understand their mechanical properties. As a specific example, the melting behavior of semicrystalline polyethylene can be studied by thermal analysis and NMR spectroscopy. In ultra high molecular weight polyethylene (UHMW-PE) crystallised via different routes, i.e., directly during polymerisation, from solution, or from the melt, and melted under different protocols, different melting processes involving detachment of stems from the crystals and cluster melting can be distinguished. Melting by the consecutive detachment of chain stems from the crystal substrate ultimately results in a melt state where chain dynamics for entanglement formation are much more restricted.
authors.affiliation: Department of Materials, Loughborough University, Leicestershire LE11 3TU, United Kingdom; Department of Chemical Engineering and Chemistry/ The Dutch Polymer Institute, Eindhoven University of Technology, P.O. Box 513; 5600MB Eindhoven, The Netherlands; Max-Planck-Institute for Polymers, Ackermannweg 10, 55128 Mainz, Germany. s.rastogi@lboro.ac.uk, s.rastogi@tue.nl.
authors.forename: Sanjay
authors.initials: S
authors.lastname: Rastogi
authors.forename: Yefeng
authors.initials: Y
authors.lastname: Yao
authors.forename: Dirk R
authors.initials: DR
authors.lastname: Lippits
authors.forename: Günther W H
authors.initials: GW
authors.lastname: Höhne
authors.forename: Robert
authors.initials: R
authors.lastname: Graf
authors.forename: Hans Wolfgang
authors.initials: HW
authors.lastname: Spiess
authors.forename: Piet J
authors.initials: PJ
authors.lastname: Lemstra