The adhesion of isocyanate-based polymers to steel

Dillingham, R. G.; Moriarty, Christopher

doi:10.1080/00218460309554

Cited by 22 publications

(15 citation statements)

References 5 publications

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“…The latter might be caused by the migration of unreacted isocyanate groups from PU foam mixture to the interface region followed by the formation of chemical linkages to the active hydrogen containing groups (e.g., hydroxyl group) on TP material surface 32,[37][38][39] or some other interfacial reaction. 40, 41 Dillingham and Moriarty 42 have studied the adhesion of isocyanate based polymers to steel where they found that the origin of excellent adhesion of polymers to steel is due to the formation of oxide-cyanate esters (analogous to urethane).…”

Section: Atomic Force Microscopymentioning

confidence: 98%

Investigations on the adhesion and interfacial properties of polyurethane foam/thermoplastic materials

Mahmood

Busse

Kreßler

2007

J of Applied Polymer Sci

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The adhesion and interfacial properties of polyurethane (PU) foams with thermoplastic (TP) materials were investigated using different techniques. The adhesion performance of PU foam with TP materials was evaluated using the peel test method, and the adhesion durability was checked after different climate treatments. X-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM), and contact angle measurements were used to study the surface and interface morphology of PU foam and TP material system. Three types of PU foam samples which differ in their composition and also five commercially available TP blends systems, based on poly(carbonate), poly(styrene-co-maleic anhydride), poly(acrylonitrilebutadiene-styrene), and silicone acrylate rubber have been used. The slow reacting foam shows the best adhesion properties with all the TP materials. The climate treatments strongly effected the PU foam adhesion durability with poly(carbonate) containing TP materials (70-80% loss in adhesion), but nearly no effect with poly(styrene-co-maleic anhydride). The samples with lowered adhesion could be separated by peeling without visible foam residues on the TP surface. AFM, XPS, and surface tension studies have shown that the surface properties of the TP material are still governed by the PU foam.

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Section: Atomic Force Microscopymentioning

confidence: 98%

Investigations on the adhesion and interfacial properties of polyurethane foam/thermoplastic materials

Mahmood

Busse

Kreßler

2007

J of Applied Polymer Sci

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“…Watts [17], through the C1s peak of a thin layer of PU resin on steel, showed that the species involved in the interfacial interaction are the oxygenated and nitrogenated groups with double bonds. Dillingham and Moriarty [18] proposed the reaction of isocyanate with water adsorbed on the surface of the steel with the formation of carbamic acid which could react with isocyanate to form urea (which was not detected) but prefers to react with metal hydroxide to form carboxylate anion associated with protonated metal hydroxide.…”

Section: Dft Calculationmentioning

confidence: 99%

The interfacial interaction between isocyanate and stainless steel

Tardio

Abel

Carr

et al. 2019

International Journal of Adhesion and Adhesives

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“…In a few publications, vibration spectroscopy and XPS have been used to characterize the adsorption states of selected PU monomers on metal surfaces [23][24][25][26][27][28][29]. Though spectroscopic information is never directly related to the binding state of molecules on solids, the proposed mechanisms are believed to describe chemical adhesion of polyurethanes on metal substrates.…”

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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The adhesion of isocyanate-based polymers to steel

Cited by 22 publications

References 5 publications

Investigations on the adhesion and interfacial properties of polyurethane foam/thermoplastic materials

Investigations on the adhesion and interfacial properties of polyurethane foam/thermoplastic materials

The interfacial interaction between isocyanate and stainless steel

Adhesive Interactions of Polyurethane Monomers with Native Metal Surfaces

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