Interfacial structure of all-polyethylene laminate using scanning thermal microscope and nano-Raman spectroscope

Kotera, Masaru; Urushihara, Yoshimasa; Izumo, Daiki; Nishino, Takashi

doi:10.1016/j.polymer.2012.02.038

Cited by 14 publications

(10 citation statements)

References 39 publications

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“…These results agreed with their tendency of adhesive strength. [51,66] For an in-depth investigation into the adhesive interfacial thickness, we evaluated the adhesion interphases with STEM-EDX. Figure 9 shows the high-angle annular dark-field (HAADF) images and EDX elemental maps of carbon, nitrogen and cobalt elements in the region around the interphase of it.PP/CA without any primer treatment as well as with Co(acac)2 and Co(acac)3 primer treatment.…”

Section: Resultsmentioning

confidence: 99%

Adhesive interphase analyses of isotactic polypropylene and cyanoacrylate with cobalt complex primers

Matsumoto

Nakanishi

Hongo

et al. 2018

Polymer

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The modification of surface properties of isotactic polypropylene (it.PP) has attracted much attention in fundamental science and industrial applications. Primer treatment is a promising methods that is employed to overcome the poor adhesive property of it.PP. In this study, we examined the primer effect of the cobalt complexes, cobalt (II) acetylacetonate Co(acac)2 and cobalt (III) acetylacetonate Co(acac)3, from the perspectives of adhesive strength, curing process, surface structure, affinity between substrate and adhesive, morphology and interfacial thickness.The results obtained explain the increased adhesive strength between an isotactic polypropylene substrate and a cyanoacrylate adhesive. In particular, the interfacial regions were evaluated as "interphase" by nano-Raman scattering microscopy and transmission electron microscope-energydispersive X-ray spectroscopy. The region is expanded by applying Co(acac)2 primer as the adhesive strength increased. The Co(acac)2 primer caused the increased adhesive property with the enhancement of molecular interaction, chemical affinity, and mutual diffusion.

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Section: Resultsmentioning

confidence: 99%

Adhesive interphase analyses of isotactic polypropylene and cyanoacrylate with cobalt complex primers

Matsumoto

Nakanishi

Hongo

et al. 2018

Polymer

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“…The latter is an analog of the known all‐trans mode for hydrogenated hydrocarbon chains at 1130 cm −1 . [ 37 ] In some previous works, the identification of these two lines was confused, [ 26–29 ] but Snyder [ 23 ] and our numerical simulations of decane indicate this interpretation. Probably, difficulties with the identification of these modes were caused by the fact that the isotopic mass increase makes the vibrational modes being less characteristic (see atomic displacements for these modes in Figure S1).…”

Section: Resultsmentioning

confidence: 67%

Raman spectra of deuterated hydrocarbons for labeling applications

Okotrub

Shamaeva

Surovtsev

2021

J Raman Spectroscopy

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Raman spectroscopy is used for studying the composition of cell lipidome. However, the Raman approach suffers from limited distinguish power for different lipids. In recent years, isotopically labeled molecules are increasingly used to enhance the Raman resolution of similar compounds in biological samples. Here, we present Raman study of fully deuterated stearic acid (stearic‐d35), semi‐deuterated oleic acid (oleic d‐9), arachidonic acid with deuterated methine groups (arachidonic‐d8), and their hydrogenated analogs. Polarization properties and temperature dependences of CD stretching modes were investigated to reveal the capability of the isotopically shifted Raman peaks in molecular characterization. Sensitivity of Raman peaks to order–disorder transition corresponding was demonstrated for deuterated methine, methylene, and methyl groups. It was found that the isotopically shifted Raman peaks provide information about the orientation of deuterated Raman tags and their surroundings.

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“…In order to monitor the manufacturing process and characterize the complex laminate structures, current techniques for polymer laminate analysis include a range of optical microscopy (Joyce et al, 1997), infrared and Raman spectroscopy (Jawhari & Pastor, 1992; Sarac & Springer, 2002; Xiao et al, 2004), thermal microprobe analysis (Price et al, 1999; Morikawa et al, 2006), X-ray photoelectron spectroscopy (Gilbert et al, 2013), nuclear magnetic resonance imaging (Papon et al, 2011), scanning electron microscopy (Gupper et al, 2002; Kotera et al, 2012), transmission electron microscopy (Chou et al, 2010), and atomic force microscopy (Drake et al, 1988). In most cases, when one is analyzing a multilayer polymer laminate, the first step is to microtome a thin section perpendicular to the layer thickness to expose individual layers and avoid smearing (contamination) from one layer to the next.…”

Section: Previous Study For Polymer Laminatesmentioning

confidence: 99%

The Advantages of an Attenuated Total Internal Reflection Infrared Microspectroscopic Imaging Technique for the Analysis of Polymer Laminates

Ling

Sommer

2015

Microsc Microanal

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Until recently, the analysis of polymer laminates using infrared microspectroscopy involved the painstaking separation of individual layers by dissection or by obtaining micrometer thin cross-sections. The latter usually requires the expertise of an individual trained in microtomy and even then, the very structure of the laminate could affect the outcome of the spectral results. The recent development of attenuated total internal reflection (ATR) infrared microspectroscopy imaging has provided a new avenue for the analysis of these multilayer structures. This report compares ATR infrared microspectroscopy imaging with conventional transmission infrared microspectroscopy imaging. The results demonstrate that the ATR method offers improved spatial resolution, eliminates a variety of competing optical processes, and requires minimal sample preparation relative to transmission measurements. These advantages were illustrated using a polymer laminate consisting of 11 different layers whose thickness ranged in size from 4-20 μm. The spatial resolution achieved by using an ATR-FTIR (Fourier transform infrared spectroscopy) imaging technique was diffraction limited. Contrast in the ATR images was enhanced by principal component analysis.

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Interfacial structure of all-polyethylene laminate using scanning thermal microscope and nano-Raman spectroscope

Cited by 14 publications

References 39 publications

Adhesive interphase analyses of isotactic polypropylene and cyanoacrylate with cobalt complex primers

Adhesive interphase analyses of isotactic polypropylene and cyanoacrylate with cobalt complex primers

Raman spectra of deuterated hydrocarbons for labeling applications

The Advantages of an Attenuated Total Internal Reflection Infrared Microspectroscopic Imaging Technique for the Analysis of Polymer Laminates

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