Quantitative Adjustment to the Molecular Energy Parameter in the Lake-Thomas Theory of Polymer Fracture Energy

TitleQuantitative Adjustment to the Molecular Energy Parameter in the Lake-Thomas Theory of Polymer Fracture Energy
Publication TypeJournal Article
Year of Publication2019
AuthorsS Wang, S Panyukov, M Rubinstein, and SL Craig
JournalMacromolecules
Volume52
Issue7
Start Page2772
Pagination2772 - 2777
Date Published04/2019
Abstract

© 2019 American Chemical Society. We present a conceptual framework for adding molecular details of chain extension and force-coupled bond dissociation to the Lake-Thomas model of tear energy in rubbery crack propagation. Incorporating data reported from single-molecule force spectroscopy experiments provides an estimate for the stored energy per bond at fracture of ∼60 kJ mol-1 for typical hydrocarbon polymers, well below the typical carbon-carbon bond dissociation energy in these systems. Opportunities to test and exploit the role of molecular extension and covalent bond scission in experimental systems are proposed.

DOI10.1021/acs.macromol.8b02341
Short TitleMacromolecules