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TitleNanostructure evolution mechanisms during slow load-cycling of oriented HDPE/PA microfibrillar blends as a function of composition
Author(s)Zeinolebadi, Ahmad
Stribeck, N.
Ganjaee-Sari, Morteza
Dencheva, Nadya Vasileva
Denchev, Z.
Botta, Stephan
Fatigue analysis
Structure-property relations
Issue dateNov-2012
JournalMacromolecular Materials and Engineering
Abstract(s)Oriented precursors of MFCs consisting of HDPE and PA6 or PA12 are studied during strain-controlled slow load-cycling. In the PA6-containing blends a strongly retarded nanostrain response is detected. Compatibilization induces nanostrain heterogenization. Stress fatigue is lower in the PA12 blends, but hardly decreased by the compatibilizer. Selective migration of the compatibilizer into a disordered semi-crystalline fraction of the HDPE matrix can explain the findings. The semi-crystalline HDPE entities in PA6 blends appear more disordered than in PA12-blends. An analysis of the HDPE nanostructure evolution during cycling reveals epitaxial strain crystallization. Uncompatibilized PA6 blends cycled about high pre-strain show plastic flow but nanoscopic shrinkage in the semi-crystalline stacks.
Publisher version
AccessOpen access
Appears in Collections:IPC - Artigos em revistas científicas internacionais com arbitragem

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