Interfacial structure of poly-α-olefin laminate by using scanning thermal microscope

► Interfacial structure of laminated PE/PP film was investigated by SThM. ► Spatial resolution of SThM technique was estimated to be 1.5μm. ► High-contrast image of apparent thermal conductivity could be observed at the interfacial region. ► Interfacial thickness, which depends on the thermal treatm...

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Bibliographic Details
Published in:Thermochimica acta 2012-03, Vol.531, p.1-5
Main Authors: Kotera, Masaru, Urushihara, Yoshimasa, Izumo, Daiki, Nishino, Takashi
Format: Article
Language:English
Subjects:
Chemical thermodynamics
Chemistry
Exact sciences and technology
General and physical chemistry
General. Theory
heat treatment
Interfacial thickness
Laminate
Laminates
Localized thermal analysis
Microorganisms
Microscopes
Poly-α-olefin
polyethylene
Polyethylenes
Polypropylenes
Scanning
SThM
temperature
Thermal conductivity
X-radiation
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Summary:► Interfacial structure of laminated PE/PP film was investigated by SThM. ► Spatial resolution of SThM technique was estimated to be 1.5μm. ► High-contrast image of apparent thermal conductivity could be observed at the interfacial region. ► Interfacial thickness, which depends on the thermal treatment of the laminate film, was estimated to be in micrometer order. The interfacial structure of laminated poly-α-olefin, polyethylene (PE)/polypropylene (PP), film was investigated by scanning thermal microscope (SThM). Spatial resolution of this technique was estimated as 1.5μm. Notwithstanding the flatness of the sample as observed in the height image of an atomic force micrograph, micro-thermomechanical analysis could distinguish each polymer. By scanning the thermal probe at isothermal temperature over a cross-section of the laminate film, a high-contrast image of apparent thermal conductivity at the interfacial region was obtained. The interfacial thickness was estimated to be in the micrometer order depending on the thermal treatment of the laminate film. This result coincides with the results of synchrotron X-ray microbeam diffraction. Moreover, the peel strength of the PE/PP laminate was considered to be influenced by the interfacial thickness. It is concluded that this proposed thermal-probe method is as a powerful tool for investigating the interfacial region of the polymer composites.
ISSN:0040-6031
1872-762X
DOI:10.1016/j.tca.2011.11.022