An FT-IR Study on Interfacial Interactions in Ethylene Copolymers/Aluminium Laminates in Relation to Adhesion Properties

Ulrén, Laila; Hjertberg, Thomas; Ishida, Hatsuo

doi:10.1080/00218469008048220

Cited by 35 publications

(19 citation statements)

References 23 publications

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“…In a previous report, interfacial interactions between an EBA copolymer and an oxidized aluminium surface were studied [4] where the IR absorbance mode of the carbonyl shifted from 1735 cm-to 1727 cm-'. It was suggested that this was due to an interaction with the Al-atom in the aluminium oxide.…”

Section: Resultsmentioning

confidence: 99%

“…The efficiency of the adhesion to aluminium in the latter case depends strongly on the type and polarity of the functional group used in the copolymer [3]. In an interfacial study between aluminium and ethylene copolymers, it was found that the polar groups in acrylic acid and butylacrylate formed Lewis acid/base interactions on an aluminium oxide surface [4].…”

Section: Introductionmentioning

confidence: 99%

“…A useful tool for such investigations is infrared spectroscopy, since detailed information about the interactions between the effective functional groups in the copolymers and the substrate surface can be obtained. For the interface between an ethylene-butylacrylate copolymer and an aluminium oxide surface, it was shown that the electron donating carbonyl oxygen interacted with the electron accepting aluminium atom [4]. The purpose of this work is to provide a much stronger electron accepting site on the aluminium surface, by introducing (or increasing the number of) hydroxyl groups onto it.…”

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confidence: 98%

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A FTIR study of interfacial interactions between ethylene copolymers and hydrated aluminium surfaces

Strålin

Hjertberg

1992

Journal of Adhesion Science and Technology

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Interfacial interactions to hydrated aluminium were examined for poly(ethylene-covinylacetate) EVA, poly(ethylene-co-butylacrylate) EBA, and poly(ethylene-co-acrylic acid) EAA. By means of IR reflection-absorption spectroscopy, the interactions between the effective functional groups were analysed at the polymer/aluminium interface. Thin copolymer films were prepared by solution casting onto aluminium, which had been hydrated by immersion in boiling water. The spectra representing the interface material revealed a strong hydrogen bond interaction between hydroxyl groups on the hydrated aluminium surface and the carbonyl oxygen in the ester group in EVA and EBA. The absorbance mode of the hydrogen bonded carbonyl was displaced to lower wavenumbers and appeared 34 cm-1 and 38 cm-1 below the 'free' carbonyl for EVA and EBA, respectively, which indicates that the hydrogen bond is very strong. For the C-O stretching mode in the ester group, a displacement of 36 cm 1 in the opposite direction was observed, also an effect due to the hydrogen bond to the carbonyl. Furthermore, it was found that the absorptivity for the hydrogen bonded carbonyl was much higher than for the 'free', and for that reason a relative absorptivity ratio between them was determined. For EAA cast onto hydrated aluminium surfaces, the absorbance mode of the carbonyl disappeared, but new peaks arose at lower wavenumbers indicative of a carboxylate. This was explained to be due to a reaction between carboxylic acid groups and aluminium hydroxyl groups on the hydrated surface.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 98%

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A FTIR study of interfacial interactions between ethylene copolymers and hydrated aluminium surfaces

Strålin

Hjertberg

1992

Journal of Adhesion Science and Technology

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“…In a previous study it has been found that the carbonyl in EBA formed a Lewis acid/base interaction with an oxidized aluminium surface. 6 The electron-accepting aluminium in the surface oxide was then proposed to act as the Lewis acid, and in this case the IR absorbance mode for the carbonyl was displaced by 8 cm-'. In the present study the carbonyl in EBA was displaced by 37 cm-' at the interface with hydrated aluminium.…”

Section: Resultsmentioning

confidence: 99%

FTIR Study on interfacial interactions between hydrated aluminium and polar groups in ethylene copolymers

Strålin

Hjertberg

1993

Surface & Interface Analysis

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By means of reflection-absorption infrared spectroscopy, interfacial interactions were studied between hydrated aluminium and two ethylene copolymers, poly(ethy1ene-co-butyl acrylate) (EBA) and poly(ethy1ene-m-acrylic acid) (EAA). The hydrated aluminium surfaces were obtained by immersion in boiling water, which produces a pseudoboehmite film consisting of aluminium oxyhydroxide. Thin films of the polymers were prepared on the substrates by solution casting. Owing to the relatively large surface area of the substrates after hydration, it was possible to obtain spectra only representing polymer interacting with the surface. For EBA, the carbonyl absorbance of the bulk at 1735 cm-' was displaced to 1698 cm-' at the interface, owing to an interaction with the hydroxy groups on the hydrated surface. For EAA, on the other hand, a carboxylate was observed at the interface with the hydrated surface. The carboxylate formation and the large displacement of the carbonyl in the case of EBA indicate that strong bonds are formed at the interface. This is also supported by the results of the adhesive strength for EBA, where the locus of failure was changed from adhesive to cohesive.

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“…In this connection, pure aluminum and its oxide can adsorb protic and aprotic acids and bases to form chemical and physical bonds [1][2][3][4][5][6]. It was revealed that short-and long-chain carboxylic acids with donor-acceptor properties can be chemisorbed on aprotic sites or OH groups of the surface or simultaneously on these both sites to form different carboxylates (monodentate, bidentate, and chelate forms) [4][5][6][7][8][9]. The adsorption of electron-donor oxygen and nitrogen containing compounds is also accompanied by the formation of physical and chemical bonds with the surface [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Interaction between carboxylic modifiers and nanodispersed aluminium

Полунина

Roldugin

Kolesnikova

et al. 2004

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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An FT-IR Study on Interfacial Interactions in Ethylene Copolymers/Aluminium Laminates in Relation to Adhesion Properties

Cited by 35 publications

References 23 publications

A FTIR study of interfacial interactions between ethylene copolymers and hydrated aluminium surfaces

A FTIR study of interfacial interactions between ethylene copolymers and hydrated aluminium surfaces

FTIR Study on interfacial interactions between hydrated aluminium and polar groups in ethylene copolymers

Interaction between carboxylic modifiers and nanodispersed aluminium

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