The Diffusion Theory of Adhesion

Voyutskii, S.S.

doi:10.5254/1.3542193

Cited by 21 publications

(13 citation statements)

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“…Diffusion adhesion: adhesion particularly effective with polymer chains where one end of the molecule diffuses into the other material (atoms diffuse from one particle to another). This adhesion can be applied in mutually miscible and compatible polymer [17]. This theory is relevant when temperature would be lower than the 'Glass transition temperature' (Tg) [18].…”

Section: Background Information Of Adhesionmentioning

confidence: 97%

Chitosan: Emergence as potent candidate for green adhesive market

Patel

2015

Biochemical Engineering Journal

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Section: Background Information Of Adhesionmentioning

confidence: 97%

Chitosan: Emergence as potent candidate for green adhesive market

Patel

2015

Biochemical Engineering Journal

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“…Voyutskii [1,12,13] appears to be the earliest supporter of mechanism number (1) as the rate controlling process for autohesion. This qualitative argument ascribes the increase in strength with time to diffusion of long chain molecules across the interface.…”

Section: Introductionmentioning

confidence: 99%

Time-dependent autohesion

Stacer

Schreuder-Stacer

1989

Int J Fract

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A study has been conducted to investigate the relationship between polymeric structure and time-dependent autohesion, measured in terms of autohesive fracture energy, Q. Using the method of reduced variables, it was found that G, data as a function of contact time and temperature could be superposed into master curves of temperature-reduced contact times. Autohesion master curves developed in this fashion showed fracture resistance increasing with time along a logarithmic-type curve with monotonically decreasing slope. These data indicate that the generally accepted ½ power law dependency for autohesion only applies over a narrow range of contact times. Modelling of the experimental results was accomplished using a first-order kinetic equation derived to account for contact-area formation. Two diffusion-based models also provided good predictions in specific cases, most notably for the effect of molecular weight on time to equilibrium. However, evidence that diffusion is not the rate controlling process included the pronounced effects of contact pressure on autohesion and the identical timedependent behavior of nondiffusing crosslinked networks when compared with systems containing mobile polymeric chains.

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“…Allen [8] argues that the penetration of polymers into interstices of a metal surface involves a diffusion mechanism, although he admits that this is an extreme interpretation of the original proposals of Voyutskii [23] that deal with the inter-diffusion of polymers. Interdiffusion may, however, be operative in the adhesion of the polymer to primers and coupling agents, if a high degree of cross-linking or crystallinity is lacking [7].…”

Section: Diffusion Theorymentioning

confidence: 99%

“…The diffusion theory of adhesion proposes that the intrinsic adhesion arises from the mutual inter-diffusion of polymer molecules across the polymer/polymer interface [7,8,23,24]. For this inter-diffusion to occur the macromolecules, or chain segments of the polymers, need to possess sufficient mobility and exhibit mutual solubility.…”

Section: Diffusion Theorymentioning

confidence: 99%

Durability of Adhesive Joints

Davis¹

1966

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One of the most important requirements of an adhesive joint is the ability to retain a significant proportion of its load-bearing capability for the long periods under the wide variety of environmental conditions encountered during its service-life. There exists a need to improve the understanding of the mechanics and mechanisms associated with the durability of adhesive joints in hostile environments, such as one of the most potentially The results from these studies showed that: (a) constant displacement rate and cyclicfatigue tests provide excellent quantitative durability test methodologies; (b) fracture mechanics and advanced surface analysis of adhesive joints have proven surface pretreatments using phosphoric acid anodising (PAA) are far superior to those employing a grit blasting and degreasing (GBD) pretreatment which can be attributed to the increased surface area and excellent bonding morphology of the anodised oxide surface, allowing deep penetration of the viscous adhesive and impeding water ingress at the adhesive/substrate interface; (c) the durability performance of PAA pretreated adhesive joints employing a primer (PAAP) are superior to those without a primer specifically in water, and acid-based surface pretreatments are significantly advanced compared to simple GBD; and (d) the self assembling long carbon-chain silanes enhance the durability of adhesive joints via the formation of covalent bonds between the adhesive and the activated silane monolayer deposited on the substrate.

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The Diffusion Theory of Adhesion

Cited by 21 publications

References 0 publications

Chitosan: Emergence as potent candidate for green adhesive market

Chitosan: Emergence as potent candidate for green adhesive market

Time-dependent autohesion

Durability of Adhesive Joints

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