A theoretical study of the bonding and XPS spectra of chromium interacting with a polyimide model compound

Rossi, Angelo R.; Sanda, P. N.; Silverman, B. D.; Ho, Paul S.

doi:10.1021/om00146a024

Cited by 38 publications

(15 citation statements)

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“…Some thin film adhesion studies have assessed the chemistry of the film and substrate after a peel test to determine if film residue is left on the substrate after mechanical removal [27,28]. Other more in-depth investigations use in-situ X-ray photoelectron spectroscopy (XPS) experiments [29][30][31][32][33][34] or in-situ Auger electron spectroscopy (AES) [35] to reveal the bonding nature of metals to polymers over a few monolayers. The main finding of these investigations has been that during the first few monolayers of deposition, a compound of the depositing film, carbon, and oxygen forms first.…”

Section: Resultsmentioning

confidence: 99%

Thickness effect on the fracture and delamination of titanium films

Cordill

Taylor

2015

Thin Solid Films

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Section: Resultsmentioning

confidence: 99%

Thickness effect on the fracture and delamination of titanium films

Cordill

Taylor

2015

Thin Solid Films

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“…[34,35] Here, we present the binding energies of N 1s for PI-clay nanocomposites as well as their differences with neat PI to verify the interaction between nitrogen in dianhydride end group of PI and the clay surface. Figure 8 displays the XPS spectra of neat PI, PIC-25, and PIC-5, respectively.…”

Section: Pi/clay Interactionmentioning

confidence: 99%

The Effect of Nanofiller on the Thermomechanical Properties of Polyimide/Clay Nanocomposites

Mya

Wang

Chen

et al. 2008

Macro Chemistry & Physics

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The interaction between PI and partially exfoliated clay nanofillers is investigated by studying the thermomechanical properties of the resulting nanocomposites by NMR, XPS, XRD, TEM, TGA, TMA, and DMA. XRD and TEM showed more exfoliated structure at ≤2.5 wt.‐% clay and a macrophase separation above 2.5 wt.‐% clay. Td and the storage modulus increased with increasing clay content. A decrease in CTE was observed for clay content ≤2.5 wt.‐% because of the good dispersion of the clay in the polymer and the reduced segmental motion of polymer matrix. NMR confirmed the quality of clay dispersion, and XPS exhibited that the interaction in PI/2.5 wt.‐% clay is much stronger than that in PI/5 wt.‐% clay.magnified image

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“…In contrast to experimental work, theoretical studies of polymer-metal interfaces are relatively few. To our knowledge, all of the reported studies have examined the local chemistry of oligomers or model organic compounds with metal atoms within the framework of Hartree-Fock molecular orbital theory.9, 16,17,22,23 As a consequence ofthe spectroscopic and theoretical studies, the chemistry ofchromium and aluminum atoms interacting with PMDA-ODA and aluminum atoms interacting with PMMA is fairly well characterized.…”

Section: Introductionmentioning

confidence: 99%

The nature of the interactions of poly(methyl methacrylate) oligomers with an aluminum surface

Shaffer

Chakraborty

Tirrell

et al. 1991

The Journal of Chemical Physics

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Incubation: Subthreshold ablation of poly-(methyl methacrylate) and the nature of the decomposition pathways Polymer-metal interfaces are of increasing technological importance in a variety of applications. These interfaces are characterized by specific interactions between functional _ groups of the organic polymer and the metallic substrate. In order to study the structure of these interfaces at the molecular level, the energetics of the segment-surface interactions must be well characterized. We have used density functional theory to investigate the interactions of poly(methyl methacrylate) (PMMA) oligomers with aluminum surfaces. The aluminum surface is represented by the simple jellium model. The energetics of the interactions between the organic molecules and the aluminum surface are calculated as a function of the orientation with respect to the surface of the organic molecule and various internal degrees of freedom. The computed energy hypersurfaces exhibit a rich structure characterized by several energy minima and barriers. Implications of such an energy hypersurface for the architecture of long chain molecules at the interface are discussed. The energy hypersurfaces also show that the rotational conformational statistics of PMMA interacting with an aluminum surface should be quite different from that of bulk PMMA. The reported energy hypersurfaces have been used to construct an empirical force-field for future molecular simulations oflong chains subject to the proper potentials.

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A theoretical study of the bonding and XPS spectra of chromium interacting with a polyimide model compound

Cited by 38 publications

References 5 publications

Thickness effect on the fracture and delamination of titanium films

Thickness effect on the fracture and delamination of titanium films

The Effect of Nanofiller on the Thermomechanical Properties of Polyimide/Clay Nanocomposites

The nature of the interactions of poly(methyl methacrylate) oligomers with an aluminum surface

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