On the origin of brittle fracture of entangled polymer solutions and melts

Manfred H. Wagner*, Esmaeil Narimissa, Qian Huang

*Corresponding author for this work

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Abstract

A novel criterion for brittle fracture of entangled polymer liquids is presented: Crack initiation follows from rupture of primary C-C bonds, when the strain energy of an entanglement segment reaches the energy of the covalent bond. Thermal fluctuations lead to a short-time concentration of the strain energy on one C-C bond of the entanglement segment, and the chain ruptures. This limits the maximum achievable stretch of entanglement segments to a critical stretch of f(c)
Original languageEnglish
JournalJournal of Rheology
Volume62
Issue number1
Pages (from-to)221-233
ISSN0148-6055
DOIs
Publication statusPublished - 2018

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