Peel Morphology of Acrylate Adhesive Polymers

Kano, Yoshihisa; Ushiki, Hideharu; Akiyama, Saburo

doi:10.1080/00218469308026601

Cited by 5 publications

(5 citation statements)

References 19 publications

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“…The mechanisms of flow observed in the case of the uncross-linked adhesive B have been observed before [8], so we will not go into details here: there is only one mechanism here which is similar to mechanism C2 in [7]. It is a three-dimensional one, characterized by the formation of long regular ribs, such as the ones observed in hydrodynamic instabilities (see for example Coyle et al [24]) occurring at a free surface.…”

Section: Peeling Of Adhesive B On Pyrextmmentioning

confidence: 85%

“…Urahama and co-authors [5, 61 revealed the importance of the stringiness in a peel test. Kano et al [7] studied the peeling morphology of various acrylic adhesives and observed saw-tooth mechanisms from below (two-dimensional photographs). They explained these phenomena by the different dynamic shear properties as well as their mean relaxation times using a fluorescence depolarization technique.…”

Section: Introductionmentioning

confidence: 99%

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Peeling of Acrylic Pressure Sensitive Adhesives: Cross-Linked versus Uncross-Linked Adhesives

Verdier

Piau

Benyahia

1998

The Journal of Adhesion

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In this paper we analyze the adhesive properties of two kinds of adhesives, determined by a 90" peeling test on a PyrexTM substrate. Simultaneously, we observe the mechanisms of flow at the peeling front. An uncross-linked acrylic pressure-sensitive adhesive is used, whereas the second one, of the same class, is slightly cross-linked. The mechanisms of peeling are compared with the ones of our previous study (Benyahia er ul. [8]) and are found to be identical in the case of uncross-linked adhesives. On the other hand, we find new regimes of flow when the adhesive is cross-linked.To investigate these differences further, we determine the rheometrical properties of the adhesives in dynamic shear tests and in uniaxial elongational experiments. Furthermore, surfaces are characterized.A discussion of the peeling curves is finally presented, showing the combined effects of the rheological properties and the surface ones. Conditions for predicting the type of regimes and transitions are also investigated.

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Section: Peeling Of Adhesive B On Pyrextmmentioning

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Peeling of Acrylic Pressure Sensitive Adhesives: Cross-Linked versus Uncross-Linked Adhesives

Verdier

Piau

Benyahia

1998

The Journal of Adhesion

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“…Last, we examine the effects of acrylic acid moieties on the structural development of the polymer network. Other studies have indicated that small amounts of acrylic acid groups (3−4 mol %) within the polymer or copolymer will greatly enhance its adhesive properties. − We probe these effects by performing axisymmetric adhesion tests on thin, polymer layers using a glass, hemispherical indenter.…”

Section: Introductionmentioning

confidence: 99%

Structural Development and Adhesion of Acrylic ABA Triblock Copolymer Gels

1999

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Relationships between the structure, properties, and processing techniques of model polymer gels are investigated. The mechanical properties of the gels are determined by a thermally reversible aggregation of the syndiotactic PMMA end blocks of an acrylic triblock copolymer, which is diluted with a selective solvent for the center block. The adhesive and mechanical properties of these gels are related to their structural features, which are quantified by small-angle X-ray scattering experiments. The gels are significantly strengthened by the addition of low molecular weight isotactic PMMA homopolymers. These polymers form complexes with the syndiotactic PMMA end blocks of the triblock copolymer. In addition, we employ an axisymmetric adhesion test to demonstrate that the equilibrium gelation process can be utilized to reproducibly control the structure and adhesive properties of “dried” polymers. Acrylic acid moieties increase the adhesive performance of these materials without affecting their structure. By employing a unique gel casting process, a network structure with the desired properties can be formed, giving materials that are ideally suited for use as pressure-sensitive adhesives.

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“…In commercial formulations of PSAs, acrylic acid is often copolymerized in small amounts with another acrylic monomer to produce a rubbery copolymer with good tack. , For example, ref lists compositions of polyacrylate-based general purpose tapes and conformable, high-tack adhesives that include 3−5 mol % acrylic acid. Even at such low concentrations of acrylic acid, the tack and adhesive properties of the copolymer are significantly increased over those of the uncarboxylated homopolymer.…”

Section: Introductionmentioning

confidence: 99%

Effects of Methylation and Neutralization of Carboxylated Poly(n-butyl acrylate) on the Interfacial and Bulk Contributions to Adhesion

Ahn

Shull

1998

Langmuir

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The relationship between the energy release rate (or adhesion energy) and the crack velocity has been measured for a variety of cross-linked elastomers based on carboxylated poly(n-butyl acrylate). Methylation of the carboxyl groups decreased adhesion energies to the glassy polymer substrates used in these experiments, and neutralization of the carboxyl groups increased the adhesion energy to these substrates. The primary effect of methylation or neutralization was to change the velocity dependence of the adhesion energy. These changes were consistent with changes in the measured relaxation times of un-cross-linked carboxylated, methylated and neutralized polymers. Effects on the critical energy release rate required for measurable crack motions were consistent with a contact charging mechanism, involving transfer of a proton for the carboxylated elastomers, and transfer of a sodium ion for the neutralized polymers.

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Peel Morphology of Acrylate Adhesive Polymers

Cited by 5 publications

References 19 publications

Peeling of Acrylic Pressure Sensitive Adhesives: Cross-Linked versus Uncross-Linked Adhesives

Peeling of Acrylic Pressure Sensitive Adhesives: Cross-Linked versus Uncross-Linked Adhesives

Structural Development and Adhesion of Acrylic ABA Triblock Copolymer Gels

Effects of Methylation and Neutralization of Carboxylated Poly(n-butyl acrylate) on the Interfacial and Bulk Contributions to Adhesion

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