Nanoindentation-induced delamination of submicron polymeric coatings

Geng, Kebin; Yang, Fuqian; Druffel, Thad; Grulke, Eric A.

doi:10.1016/j.polymer.2006.07.075

Cited by 11 publications

(3 citation statements)

References 36 publications

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“…The signal at 300 nm coincide with the transition region of a soft layer (L3) to a hard one (L2) at a depth of 289 ± 39 nm. Delamination of films was found to cause similar signals in nanoindentation experiments [32] and might be a plausible explanation for the latter signal. However it is not clear which interface in the stack of films delaminated.…”

Section: Resultsmentioning

confidence: 65%

Interface roughness of plasma deposited polymer layers

Zhang

Arfsten

Pihan

et al. 2010

Journal of Colloid and Interface Science

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Section: Resultsmentioning

confidence: 65%

Interface roughness of plasma deposited polymer layers

Zhang

Arfsten

Pihan

et al. 2010

Journal of Colloid and Interface Science

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“…Every single indentation experiment from this set consists of the following subsequent steps: (i) approaching the surface; (ii) loading to the peak load for 15 s; (iii) holding the indenter at peak load for 10 s; (iv) unloading from maximum force to 10% for 15 s; (v) holding at 10% of max force 15 s; (vi) final complete unloading for 1 s (load function 15–10—15 s trapezoid). The typical load–displacement and load–time dependencies of a viscoelastic material are shown in Figure (a,b) …”

Section: Methodsmentioning

confidence: 99%

Mechanical behavior at nanoscale of chitosan‐coated PE surface

Stoleru¹,

Tsekov

Kotsilkova

et al. 2015

J of Applied Polymer Sci

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Chitosan coating of polyethylene (PE) was proposed as a new procedure to improve its biocompatibility and surface properties. The functionalization of the PE film surface by covalent bonding of chitosan coating and its effect on the surface mechanical properties, as surface elasticity, stiffness, and adhesion (that are important in different biological processes) were investigated by nano-indentation, scratch, and atomic force microscopy. It has been established that chitosan grafting onto corona functionalized PE surface using various coupling agents significantly improves the surface hardness and elastic modulus although they decrease in depth of the layer. Compared to the neat PE substrate, the chitosan coated samples show significant improved friction properties and tear resistance. The surface roughness features correlate with the micro-mechanical parameters. Therefore, the covalent immobilization of the chitosan onto PE leads to a stable coating with better mechanical performance being recommended as a promising material for medical applications and food packaging.

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“…In comparison there was much more work done on thin or submicron polymer films (freestanding or as coating on polymer or inorganic substrates) dealing with indentation (mostly nanoindentation) 11–15 and scratch/delamination behavior. 16–20 Scratching is a major problem for the film-making industry (e.g. credit and comparable cards as well as packaging and protective films).…”

Section: Introductionmentioning

confidence: 99%

Recording microindentation and adhesion tests to analyse the depth-dependent mechanical and adhesive properties of multilayer polymer films as shown for gelatine-coated polyethylene terephthalate and polyethylene films

Lach

Richter

Heilmann

et al. 2020

Journal of Plastic Film & Sheeting

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Further developed methods based on an indenter penetration into a material allow generalised quantitative statements on the composition, the depth-dependent mechanical properties and the delamination behaviour of multilayer polymer films, which is demonstrated on gelatine-coated polyethylene terephthalate and polyethylene films. These highly sensitive polymer testing methods, include the recording microindentation test and the recording adhesion test, describe the material behaviour multi-parametrically and are fast (raw data acquisition within several minutes) and relatively simple, requiring a minimum 1 gram sample depending on the film thickness. Based on the Vickers hardness under load approach, the hardness–depth diagrams calculated from the recording microindentation test provide information about the structure, the thickness and the coating hardness and the substrates. The tangential load vs. tangential path length diagrams from recording adhesion test can detect different scratch processes such as continuous scratching or non-continuous stick-slip layer delamination. Furthermore, they form the basis to quantitatively analyze adhesion, i.e. to determine the critical tangential load and the critical tangential delamination work. Both are highly dependent on the substrate type and treatment.

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Nanoindentation-induced delamination of submicron polymeric coatings

Cited by 11 publications

References 36 publications

Interface roughness of plasma deposited polymer layers

Interface roughness of plasma deposited polymer layers

Mechanical behavior at nanoscale of chitosan‐coated PE surface

Recording microindentation and adhesion tests to analyse the depth-dependent mechanical and adhesive properties of multilayer polymer films as shown for gelatine-coated polyethylene terephthalate and polyethylene films

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