Twisted topological solitons and dislocations in a polymer crystal

A. V. Savin, J. M. Khalack, Peter Leth Christiansen, Alexander Zolotaryuk

    Research output: Contribution to journalJournal articleResearchpeer-review

    281 Downloads (Pure)

    Abstract

    Topological defects and dislocations in strongly anisotropic crystals consisting of parallel molecular chains are investigated. Our study is focused on the defects in crystalline polyethelyne, which are formed by transverse displacements of chain molecules (mutual substitutions and interlacings of adjacent molecular chains in the polymer crystal). It is shown that some of these defects called "twisted topological solitons" can propagate with a stationary profile and velocity. To describe the dynamics of these solitons, a model that accounts for the three components of the molecular displacements is suggested. Linear topological defects-dislocations-that incorporate the bending of molecular chains in the crystal are also studied.
    Original languageEnglish
    JournalPhysical Review B Condensed Matter
    Volume65
    Issue number5
    Pages (from-to)054106
    ISSN0163-1829
    DOIs
    Publication statusPublished - 2002

    Bibliographical note

    Copyright (2002) American Physical Society

    Keywords

    • POLYETHYLENE
    • FRENKEL-KONTOROVA MODEL
    • KINKS
    • TRANSVERSAL DEGREE
    • FERROELASTIC-MARTENSITIC TRANSFORMATIONS
    • LATTICE MODEL
    • MOLECULAR-DYNAMICS SIMULATION
    • PATTERNS
    • FREEDOM

    Cite this