Models for adhesion at weak polymer interfaces

Jianbin Zhang, Timothy P. Lodge, Christopher W. Macosko

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

The weak interfaces between immiscible polymer pairs typically fail through chain scission. The critical facture toughness for such interfaces is closely related to the density of intermolecular entanglements at the interface. From scaling analysis, a simple correlation between facture toughness and chain entanglement was developed. It predicts well the interfacial adhesion for many immiscible polymer pairs found in the literature. For an interface with block copolymer reinforcement, its critical fracture toughness comes from both intermolecular entanglements of homopolymers and copolymer bridges. In the chain scission regime (low copolymer coverage), the block copolymer contribution is found proportional to copolymer interfacial coverage, with the coefficient being the energy to stretch and break a copolymer chain. The chainbreaking energy for different copolymers was evaluated and compared to literature data.

Original languageEnglish (US)
Pages (from-to)2313-2319
Number of pages7
JournalJournal of Polymer Science, Part B: Polymer Physics
Volume47
Issue number23
DOIs
StatePublished - Dec 1 2009

Keywords

  • Adhesion
  • Blends
  • Block copolymers
  • Interfaces

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