Dip or Step-Like Features in the Infrared Reflection Spectra of Heat-Treated Polyoxymethylene

When injection-molded polyoxymethylene is heat-treated below its melting point, it shows increased polarized reflection along the injection direction, as confirmed through micro-infrared spectroscopy. A characteristic dip or step-like structure appears around 940 cm . Previously, the origin of this...

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Bibliographic Details
Published inApplied spectroscopy Vol. 79; no. 8; p. 1279
Main Authors Nagai, Naoto, Amaki, Yuko
Format Journal Article
LanguageEnglish
Published United States 01.08.2025
Subjects
Polyoxymethylene
reflection
relative permittivity
anisotropy
IR
Reststrahlen
dip
infrared
off-normal incidence leakage effect
step-like structure
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Summary:When injection-molded polyoxymethylene is heat-treated below its melting point, it shows increased polarized reflection along the injection direction, as confirmed through micro-infrared spectroscopy. A characteristic dip or step-like structure appears around 940 cm . Previously, the origin of this structure was unclear. However, we have found that it can be explained by refining the calculation model to account for the relative permittivity perpendicular to the sample surface.
ISSN:1943-3530
DOI:10.1177/00037028251328049