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

Abstract In this paper we analyze the adhesive properties of two kinds of adhesives, determined by a 90[ddot] 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 et al [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 inves...

[1]  R. Landel,et al.  The Temperature Dependence of Relaxation Mechanisms in Amorphous Polymers and Other Glass-Forming Liquids , 1955 .

[2]  D. H. Kaelble,et al.  Theory and Analysis of Peel Adhesion: Bond Stresses and Distributions , 1960 .

[3]  Frederick M. Fowkes,et al.  ADDITIVITY OF INTERMOLECULAR FORCES AT INTERFACES. I. DETERMINATION OF THE CONTRIBUTION TO SURFACE AND INTERFACIAL TENSIONS OF DISPERSION FORCES IN VARIOUS LIQUIDS1 , 1963 .

[4]  D. K. Owens,et al.  Estimation of the surface free energy of polymers , 1969 .

[5]  D. H. Kaelble,et al.  Peel Adhesion: Influence of Surface Energies and Adhesive Rheology , 1969 .

[6]  A. Gent,et al.  Adhesion of viscoelastic materials to rigid substrates , 1969, Proceedings of the Royal Society of London. A. Mathematical and Physical Sciences.

[7]  D. Maugis,et al.  Fracture mechanics and the adherence of viscoelastic bodies , 1978 .

[8]  Stress Distribution during Peeling of Adhesive Tapes , 1981 .

[9]  W. F. Parsons,et al.  Prediction of Peel Adhesion using Extensional Rheometry , 1981 .

[10]  R. Gupta.  Comments on “Prediction of Peel Adhesion Using Extensional Rheometry” by Connelly, Parsons, and Pearson , 1983 .

[11]  J. Schultz,et al.  Polymer-Aluminium Adhesion II. Role of the Adhesive and Cohesive Properties of the Polymer , 1984 .

[12]  P. Gennes.  Wetting: statics and dynamics , 1985 .

[13]  L. E. Scriven,et al.  Film-splitting flows in forward roll coating , 1986, Journal of Fluid Mechanics.

[14]  H. Henning Winter,et al.  Analysis of Linear Viscoelasticity of a Crosslinking Polymer at the Gel Point , 1986 .

[15]  R. Gupta,et al.  Rheological, Interfacial and Thermal Control of Polymer Adhesion. I. Isothermal Theoryf , 1988 .

[16]  Y. Urahama.  Effect of Peel Load on Stringiness Phenomena and Peel Speed of Pressure-Sensitive Adhesive Tape , 1989 .

[17]  J. F. Kenney,et al.  Medical-grade acrylic adhesives for skin contact , 1992 .

[18]  Yoshihisa Kano,et al.  Peel Morphology of Acrylate Adhesive Polymers , 1993 .

[19]  Study of peeling properties of pressure-sensitive adhesives using a newly developed image processing system , 1995 .

[20]  Relations entre les propriétés rhéologiques et physico-chimiques des polymères et leurs propriétés adhésives : application à la peau , 1996 .

[21]  C. Verdier,et al.  Influence of rheology and surface properties in the adhesion of uncross-linked pressure sensitive adhesives , 1997 .

[22]  C. Verdier,et al.  The Mechanisms of Peeling of Uncross-Linked Pressure Sensitive Adhesives , 1997 .