Internal stresses and adhesion of thin silicon oxide coatings on poly(ethylene terephthalate)

Leterrier, Y.; Wyser, Yves; Månson, J.-Å. E.

doi:10.1163/15685610152540885

Cited by 35 publications

(29 citation statements)

References 49 publications

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“…In previous investigations, the amount of tensile force during PECVD deposition of SiO x on various polymer films, was in fact controlled to tailor the state of stress in the coating [168]. Moreover, calendering processes with other polymer films susceptible to shrinkage will induce further compressive stresses in the thin coating [169]. Heat-set treatments were developed to overcome orientation relaxation and crystallization shrinkage of the polymer if the temperature is high enough.…”

Section: Stress Optimization During Conversion Operationsmentioning

confidence: 99%

“…Polymers are also permeable to small molecules, which may lead to physical swelling phenomena, hence, to changes in stress state. The issue of long-term evolution of process-induced internal stresses, and related changes in interfacial adhesion between PET and SiO x are detailed in a recent work, in which a proportional relation between both factors was established [169,173]. In addition, long-term exposure of thin oxide films to ambient air may affect their stress state.…”

Section: Stress Optimization During Conversion Operationsmentioning

confidence: 99%

“…The fragmentation test proved its relevance in the case of a variety of thin brittle films on ductile metal [197,199,[246][247][248][249][250] and polymer substrates [10,137,[251][252][253][254][255], particularly PET [78,105,125,163,164,187,[256][257][258][259][260][261][262][263][264][265][266]. In this technique, the evolution of crack patterns in the brittle coating is monitored as a function of the tensile load applied to the substrate.…”

Section: Adhesion Measurements Of Thin Oxide Films On Polymer Substratesmentioning

confidence: 99%

“…13) [78,105,114], of coating thickness [163,164,259], and of temperature [125,263] on coating adhesion. The fragmentation test usually operates in uniaxial tension; the application of equibiaxial tension was further investigated to provide additional information regarding coating failure mechanisms [165,271,272].…”

Section: Adhesion Measurements Of Thin Oxide Films On Polymer Substratesmentioning

confidence: 99%

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Durability of nanosized oxygen-barrier coatings on polymers

Leterrier

2003

Progress in Materials Science

472

341

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Research on silicon oxide thin films developed as gas-barrier protection for polymer-based components is reviewed, with attention paid to the relations between (i) coating defects, cohesive strength and internal stress state, and (ii) interfacial interactions and related adhesion to the substrate. The deposition process of the oxide from a vapor or a plasma phase leads in both cases to the formation of covalent bonds between the two materials, with high adhesion levels. The oxide coating contains nanoscopic defects and microscopic flaws, and their respective effect on the barrier performance and mechanical resistance of the coating is analyzed. Potential improvements are discussed, including the control of internal stresses in the coating during deposition. Controlled levels of compressive internal stresses in the coating are beneficial to both the barrier performance and the mechanical reliability of the coated polymer. An optimal coating thickness, with low oxygen permeation and high cohesive strength, is determined from experimental and theoretical analyses of the failure mechanisms of the coating under mechanical load. These investigations are found relevant to tailor the interactions and stress state in the interfacial region, in order to improve the reliability of the coating/substrate assembly. #

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Section: Stress Optimization During Conversion Operationsmentioning

confidence: 99%

Section: Stress Optimization During Conversion Operationsmentioning

confidence: 99%

Section: Adhesion Measurements Of Thin Oxide Films On Polymer Substratesmentioning

confidence: 99%

Section: Adhesion Measurements Of Thin Oxide Films On Polymer Substratesmentioning

confidence: 99%

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Durability of nanosized oxygen-barrier coatings on polymers

Leterrier

2003

Progress in Materials Science

472

341

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“…Similar to deformation of a substrate, in-planes stresses can be introduced in a coating due to a mismatch in thermal expansion coefficients between the polymer and the metal substrate. Thus in-plane residual stresses of thermal origin were measured with the curvature based techniques [8][9][10][11], double cantilever test [2,[12][13][14] and other less common experimental methods [15][16][17]. High compressive stresses are also found in coatings deposited on various substrates.…”

Section: E-mail Address: Afedorov@rugnl (Av Fedorov)mentioning

confidence: 99%

Degradation and recovery of adhesion properties of deformed metal–polymer interfaces studied by laser induced delamination

Федоров¹,

Tijum²,

Vellinga³

et al. 2007

Progress in Organic Coatings

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Degradation and recovery of adhesion properties of deformed metal-polymer interfaces studied by laser induced delamination Fedorov, A. V.; van Tijum, R.; Vellinga, W. -P.; De Hosson, J. Th. M. Take-down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.Downloaded from the University of Groningen/UMCG research database (Pure): http://www.rug.nl/research/portal. For technical reasons the number of authors shown on this cover page is limited to 10 maximum. AbstractAdhesion properties of polymer coatings on metals are of great interest in various industrial applications, including packaging of food and drinks. Particular interest is focused on polymer-metal interfaces that are subjected to significant deformations during manufacturing process. In this work steel samples laminated with polyethylene terephthalate (PET) were subjected to uniaxial tensile deformations followed by annealing treatments. The measurements have demonstrated degradation of adhesion of the metal-polymer interface as the strain introduced by the deformation increased. Moreover, it was observed that within the geometry used in the experiments tensile deformations of the metal substrate introduced in-plane compressive stresses in the bulk of the coating. After applying a thermal treatment restoration of the adhesion has been achieved.Laser induced delamination technique was used to monitor the adhesion properties. In this technique a coating is subjected to a series of infrared laser pulses with a stepwise increase of intensity. Upon increasing the laser pulse intensity, the pressure which is formed inside the blisters reaches a critical value, resulting in further delamination of the coating. To process the experimental data an elastic model was developed. From the analysis of the experimental data the critical stresses required for the delamination and the practical work of adhesion are derived. The model accounts for the compressive in-plane stress present in the coating of the deformed samples.

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Mechanical Durability of Inorganic Films on Flexible Substrates

Leterrier¹

2023

Flexible Flat Panel Displays

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Internal stresses and adhesion of thin silicon oxide coatings on poly(ethylene terephthalate)

Cited by 35 publications

References 49 publications

Durability of nanosized oxygen-barrier coatings on polymers

Durability of nanosized oxygen-barrier coatings on polymers

Degradation and recovery of adhesion properties of deformed metal–polymer interfaces studied by laser induced delamination

Mechanical Durability of Inorganic Films on Flexible Substrates

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