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Microstructure anisotropy in polyolefin flexible foams

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10.1088/1757.899x/5/1/012001
 
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Antunes, Marcelo de Sousa PaisMés informacióMés informacióMés informació
Arencón Osuna, DavidMés informacióMés informacióMés informació
Redondo Realinho, Vera Cristina deMés informacióMés informacióMés informació
Velasco Perero, José IgnacioMés informacióMés informacióMés informació
Document typeArticle
Defense date2009-11
PublisherIOP Publishing Ltd.
Rights accessOpen Access
Attribution-NonCommercial-NoDerivs 3.0 Spain
Except where otherwise noted, content on this work is licensed under a Creative Commons license : Attribution-NonCommercial-NoDerivs 3.0 Spain
Abstract
The use of polyolefin flexible foams with typical thicknesses between 1 and 3 mm produced by a physical foaming extrusion process is nowadays quite widespread in the packaging sector. Their high flexibility and closed-cell structure allows them to show good energy absorption properties under low loading conditions. Although the compressive response of these materials is well known, the inner microstructure developed during processing induce a high anisotropy that is responsible for their direction-dependent tensile and fracture behaviours. In this work, two different polyolefin-based foams, with densities ranging from 20 to 45 kg/m3, were studied. The induced microstructure anisotropy was characterized by micro- Raman. With this technique, the relative orientations of both crystalline and amorphous phases in the foam’s base polymer could be determined and thus related to their mechanical properties measured in the different directions.
CitationDe Sousa Pais, M. [et al.]. Microstructure anisotropy in polyolefin flexible foams. "IOP Conference Series: Materials Science and Engineering", Novembre 2009, vol. 5, p. 1-11. 
URIhttp://hdl.handle.net/2117/6194
DOI10.1088/1757.899x/5/1/012001
ISSN1757-8981
Publisher versionhttp://iopscience.iop.org/1757-899X/5/1/012001/pdf?ejredirect=.iopscience
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