Effect of Wetting Liquids on the Strength of Adhesion of Viscoelastic Material

Gent, A. N.; Schultz, J.

doi:10.1080/00218467208072199

Cited by 525 publications

(255 citation statements)

References 11 publications

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“…This criterion has unfortunately not been used further, although it could help to understand principles such as the energy separation criterion [16] and its range of application.…”

Section: Methodsmentioning

confidence: 99%

Effect of nonlinear viscoelastic properties on tack

Verdier

Piau

2003

J Polym Sci B Polym Phys

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The influence of rheological and surface properties on adhesive tackiness are studied. In particular, the importance of the elongational properties is emphasized in a model, which considers only the adhesive contribution while neglecting the importance of cavitation and surface roughness. This simple analysis allows us to recover the different types of curves (i.e., different adhesive materials) obtained in the literature on tack. Elastic, strain‐hardening, and viscous adhesive materials are considered. The question of the importance of surface properties is raised and discussed. © 2003 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 41: 3139–3149, 2003

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“…This criterion has unfortunately not been used further, although it could help to understand principles such as the energy separation criterion [16] and its range of application.…”

Section: Methodsmentioning

confidence: 99%

Effect of nonlinear viscoelastic properties on tack

Verdier

Piau

2003

J Polym Sci B Polym Phys

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“…For pure normal loading, it is well established that the amount of energy dissipation in bulk viscoelastic materials can far exceed the intrinsic work of adhesion between two surfaces (e.g. Kendall 1971Kendall , 1975Gent & Schultz 1972; *Author for correspondence (pradeep_guduru@brown.edu). Andrews & Kinloch 1973;Barquins 1984a;Maugis 1987).…”

Section: Introductionmentioning

confidence: 99%

Mode-mixity-dependent adhesive contact of a sphere on a plane surface

2009

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Tangential loading in the presence of adhesion is highly relevant to biological locomotion, but mixed-mode contact of biological materials or similar soft elastomers remains to be well understood. To better capture the effects of dissipation in such contact problems owing to viscoelasticity or irreversible interfacial adhesive processes, a model is developed for the combined adhesive and tangential loading of a rigid sphere on a flat halfspace which incorporates a phenomenological model of energy dissipation in the form of increased effective work of adhesion with increasing degree of mode mixity. To verify the model, contact experiments are performed on polydimethylsiloxane (PDMS) samples using a custom-built microtribometer. Measurements of contact area during mixed normal/tangential loading indicate that the strong dependence of the effective work of adhesion upon mode mixity can be captured effectively by the phenomenological model in the regime where the contact area stayed circular and the slip was negligible. Rate effects were seen to be described by a power-law dependence upon the crack front velocity, similar to observations of rate-dependent contact seen for pure normal loading.

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“…[5][6][7][8][9][10][11][12][13][14][15][16] The designation ''pressure-sensitive adhesion'' attributes the behavior of PSAs to their rheological nature and the contribution of shear deformation under compressive adhesive-bonding, and adhesion strength can be predicted from rheological behavior of the PSAs in the linear domain. 5,[10][11][12]16 Time-temperature equivalence, a typical feature of rubber-like polymers, 17 applies to all PSAs, [6][7][8][9][10][11]13,14 indicating that they are viscoelastic materials. Moreover, cohesive and interfacial types of adhesive debonding also relate to the linear elastic properties of the PSAs.…”

Section: Introduction: Theories Of Adhesionmentioning

confidence: 99%

Molecular and nanoscale factors governing pressure‐sensitive adhesion strength of viscoelastic polymers

Feldstein

Siegel

2012

J Polym Sci B Polym Phys

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Pressure‐sensitive adhesives (PSAs) are finding increasing applications in various areas of industry and medicine. PSAs are a special class of viscoelastic polymers that form strong adhesive joints with substrates of varying chemical nature under application of light external bonding pressures (1–10 Pa) over short periods of time (1–5 s). To be a PSA, a polymer should possess both high fluidity under applied bonding pressure, to form good adhesive contact, and high cohesive strength and elasticity, which are necessary for resistance to debonding stresses and for dissipation of mechanical energy at the stage of adhesive bond failure under detaching force. For rational design of novel PSAs, molecular insight into mechanisms of their adhesive behavior is necessary. As shown in this review, strength of PSA adhesive joints is controlled by a combination of diffusion, viscoelastic, and relaxation mechanisms. At the molecular level, strong adhesion is the result of a narrow balance between two generally conflicting properties: high cohesive strength and large free volume. These conflicting properties are difficult to combine in a single polymer material. Individually, high cohesive interaction energy and large free volume are necessary but insufficient prerequisites for PSA strength. Evident correlations are observed between the adhesive bond strengths of different PSAs, and their relaxation behaviors are described by longer relaxation times. Innovative PSAs with tailored properties can be produced by physical mixing of nonadhesive long‐ and short‐chain linear parent polymers, with groups at the two ends of the short chains complementary to the functional groups in the recurring units of the long chains. Although chemical composition and molecular structure of such innovative adhesives are unrelated to those of conventional PSAs, their mechanical properties and adhesive behaviors obey the same general laws, such as the Dahlquist's criterion of tack. © 2012 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys, 2012

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Effect of Wetting Liquids on the Strength of Adhesion of Viscoelastic Material

Cited by 525 publications

References 11 publications

Effect of nonlinear viscoelastic properties on tack

Effect of nonlinear viscoelastic properties on tack

Mode-mixity-dependent adhesive contact of a sphere on a plane surface

Molecular and nanoscale factors governing pressure‐sensitive adhesion strength of viscoelastic polymers

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