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Authors
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Retsos, H. ; Gorodyska, G. ; Kiriy, A. ; Stamm, M. ; Creton, C.
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Title
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Adhesion between Chemically Heterogeneous Switchable Polymeric Brushes and an Elastomeric Adhesive
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Date
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21.09.2005
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Number
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13468
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Abstract
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We investigated the adhesive properties of binary heterogeneous polymer brushes made from end-functionalized polystyrene (PS) and poly(2-vinylpyridine) (P2VP) chains. The molecular organization ofthe mixed brush could be varied reversibly by exposure to selective solvents for PS (toluene) and for P2VP(acidic water). This exposure results in reversible switching of adhesive and wetting properties. The mannerin which the adhesion switching occurs can be tuned by the composition of mixed brushes. However, theouter surface composition could be enriched more effectively in PS after the toluene treatment than inP2VP after the acidic water treatment. As a result, the mixed brush compositions that showed the largestdifference in properties between an exposure to toluene and an exposure to water were the P2VP-richcompositions. Adhesive properties, tested against a soft hydrophobic pressure-sensitive adhesive (PSA)using a probe test, always showed smaller differences between solvent treatments than wetting propertieswith water, suggesting a much higher sensitivity of the hydrophobic/hydrophilic brushes to polar moleculesthan to nonpolar molecules.
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Publisher
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Langmuir
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Wikidata
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Citation
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Langmuir 21 (2005) 722-725
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DOI
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https://doi.org/10.1021/la050054s
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Tags
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pressure-sensitive-adhesives soft adhesives deformation-behavior interfacial slippage surfaces layers tack cavitation
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