期刊
POLYMER TESTING
卷 31, 期 8, 页码 1008-1018出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.polymertesting.2012.08.001
关键词
Scanning probe microscopy; Nanomechanical testing; Morphology; Polymers; Polyetherimide; Tetra-functional epoxy resin
资金
- Bayerisches Staatsministerium fur Wirtschaft, Infrastruktur, Verkehr und Technologie within the programme Neue Werkstoffe in Bayern
High resolution nanomechanical analysis in combination with high resolution topography imaging was used to investigate the phase morphology of a polyetherimide-toughened tetra-functional epoxy resin. A two-phase structure close to co-continuous morphology is observed. Here, polyetherimide and epoxy-rich regions can be clearly identified due to their different nanomechanical properties. Within the PEI-rich regions, the high resolution testing allows identification of polyetherimide-rich globules with a size between 50 nm and 500 nm, in addition to the well-known epoxy-rich rounded substructures with a diameter of about one micrometer. Etching influences the surface elastic properties and results in an increase of the epoxy surface modulus. Surface ageing results in a slight increase of the surface modulus. (C) 2012 Elsevier Ltd. All rights reserved.
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