Molecular weight effects on chain pull-out fracture of reinforced polymeric interfaces
Mohsen Sabouri-Ghomi, Slava Ispolatov, Martin Grant
Abstract
Using Brownian dynamics, we simulate the fracture of polymer interfaces reinforced by diblock connector chains. We find that for short chains the interface fracture toughness depends linearly on the degree of polymerization N of the connector chains, while for longer chains the dependence becomes N3/2. Based on the geometry of initial chain configuration, we propose a scaling argument that accounts for both short and long chain limits and crossover between them.
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