Studies on the Interphase of a Model Adhesive Joint

Possart, W.; Fanter, D.; Dieckhoff, S.; Gesang, T.; Hartwig, Andreas; Höper, R.; Schlett, V.; Hennemann, O.‐D.

doi:10.1080/00218469608013654

Cited by 15 publications

(12 citation statements)

References 5 publications

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“…A weaker adhesion of the prepolymer to the silicon wafer is in concurrence with IRS and XPS examinations 22 stating that the interaction of the prepolymer is much weaker to the silicon than to the aluminum.…”

Section: Resultssupporting

confidence: 79%

“…The forces have a limited range d which is independent of R . Since no covalent bonds (≈0.1 nm range) were found in our IRS and XPS investigations, one expects a larger range (typically 0.5 nm for various molecular attractive interactions) which, however, is still small compared to the size of the adsorbate (AFM: height 6−13 nm). Assuming within the area a both a homogeneous strength and area density of the interactions, the total attractive force is proportional to a which in turn is proportional to R .…”

Section: Resultsmentioning

confidence: 76%

“…Spectroscopic results regarding film composition, molecular arrangement, and interaction are reported elsewhere. 22,23 AFM in its various modes of operation revealed the growth modes and their dependency on both the material and preparation parameters. The comparative interpretation of the results provides new insight into the microscopic processes of adsorption and growth.…”

Section: Introductionmentioning

confidence: 99%

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Investigations on the Influence of Adhesion, Cohesion, and External Forces on the Formation of Ultrathin Polymeric Films

et al. 1996

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The birth and growth of ultrathin polymer films out of solution were studied by means of atomic force microscopy (AFM). The system investigated consisted of a model substance for a curable high-temperature adhesive (a prepolymer of the dicyanate of bisphenol A) and as received silicon wafers or aluminum evaporation coatings. The application techniques, dip-coating and spin-coating, allow film formation either in nearly equilibrated conditions or with the influence of centrifugal acceleration, respectively. AFM reveals significant differences between the films depending on the application technique and the substrate, but in some instances there are surprising similarities. The comparative interpretation of the findings results in the proposal of a model for the film formation of the investigated systems.

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Section: Resultssupporting

confidence: 79%

Section: Resultsmentioning

confidence: 76%

Section: Introductionmentioning

confidence: 99%

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Investigations on the Influence of Adhesion, Cohesion, and External Forces on the Formation of Ultrathin Polymeric Films

et al. 1996

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“…The list contains acrylate, epoxy, and polycyanurate monomer and oligomer molecules on inorganic solids [1][2][3][4][5][6][7][8][9][10]. It includes changes of bonding with substrate state and ageing time, e.g., due to temperature and other external influences [11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Adhesive Interactions of Polyurethane Monomers with Native Metal Surfaces

Nies

Wehlack

Ehbing

et al. 2012

The Journal of Adhesion

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Understanding of fundamental adhesion is a key issue for bonding, polymer composites, and coatings. In this study, diluted solutions of polyurethane monomers (methylene diphenyl diisocyanate isomer mixture-MDI, polypropylene ether triol-PPET) are exposed to the native surfaces of Au, Al, and Cu. The adsorption state of the molecules (from multi-to sub-monolayers) is investigated in situ by infrared external reflection absorption spectroscopy (IR-ERAS). A sequence of solvent rinsing steps helps to distinguish physisorbed from chemisorbed molecules. PPET sticks very weakly to the metals. The spectra reveal a bulk-like state. MDI adsorbs weakly on Au but the spectra differ significantly from the bulk state. On Al and Cu, MDI establishes strong adhesion. Rich new spectral features indicate a probably chemical nature of adhesion, and a specific structure in the neighboring adsorbate layer. However, detailed final conclusions on the adhesion mechanisms must not be derived without appropriate quantum mechanical modeling.

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“…This technique has been applied here for investigating the film=substrate interface for plasma-polymerized films on metal substrates. In addition, this technique has been used for investigating the polymer=metal interface formed between metal substrates and adhesives [4].…”

Section: Introductionmentioning

confidence: 99%

Molecular structure of interfaces formed with plasma-polymerized silica-like primer films: Part I. Characterization of the primer/metal interface using infrared spectroscopy in SITU

Turner

Boerio

2002

The Journal of Adhesion

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Reflection-absorption infrared (RAIR) spectroscopy was performed in situ on plasma polymerized silica-like films that were deposited onto metal substrates. Relatively thick films ( $ 8.0 nm) had infrared spectra that were typical of bulk amorphous silicon dioxide (a-SiO 2 ). When thinner films were analyzed ( $ 0.6 nm), other infrared bands emerged that were due to the formation of silicon suboxide at the interface. Infrared bands due to oxidation of the substrate during deposition were also observed. It was determined that during the initial stages of plasma deposition, metal atoms from the substrate migrated to the metal-oxide surface. This resulted in preferential oxidation of metal atoms with the formation of silicon suboxide at the film=metal interface. In addition, interfacial suboxide formation was shown to have a dependence upon the diffusivity of the metal substrate atoms through the surface oxide of the metal. As a result, more interfacial suboxide was observed to form for depositions on titanium substrates in comparison with depositions on aluminum substrates.

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Studies on the Interphase of a Model Adhesive Joint

Cited by 15 publications

References 5 publications

Investigations on the Influence of Adhesion, Cohesion, and External Forces on the Formation of Ultrathin Polymeric Films

Investigations on the Influence of Adhesion, Cohesion, and External Forces on the Formation of Ultrathin Polymeric Films

Adhesive Interactions of Polyurethane Monomers with Native Metal Surfaces

Molecular structure of interfaces formed with plasma-polymerized silica-like primer films: Part I. Characterization of the primer/metal interface using infrared spectroscopy in SITU

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