Лако-красочные материалы — производство

It is easily understandable that chemical bonds formed across the adhesive-substrate interface can greatly participate to the level of adhesion between both materials. These bonds are generally considered as primary bonds in comparison with physical interactions, such as van der Waals, which are called secondary force interactions. The terms primary and secondary stem from the […]

The diffusion theory of adhesion is based on the assumption that the adhesion strength of polymers to themselves (autohesion) or to each other is due to mutual diffusion (inter­diffusion) of macromolecules across the interface, thus creating an interphase. Such a mechanism, mainly supported by Voyutskii [71], implies that the macromolecular chains or chain segments are […]

The thermodynamic model of adhesion, generally attributed to Sharpe and Schonhorn [35], is certainly the most widely used approach in adhesion science at present. This theory is based on the belief that the adhesive will adhere to the substrate because of interatomic and intermolecular forces established at the interface, provided that an intimate contact is […]

It is now well known that alterations and modifications of the adhesive and/or adherend can be found in the vicinity of the interface leading to the formation of an interfacial zone exhibiting properties (or properties gradient) that differ from those of the bulk materials. The first approach to this problem is due to Bikerman [24], […]

The electronic theory of adhesion was proposed primarily by Deryaguin and co-workers [15-19] in 1948. These authors have suggested that an electron transfer mechanism between the substrate and the adhesive, having different electronic band structures, can occur to equalize the Fermi levels. This phenomenon could induce the formation of a double electrical layer at the […]

A. Mechanical Interlocking The mechanical interlocking model, proposed by MacBain and Hopkins in 1925 [1], conceives of mechanical keying, or interlocking, of the adhesive into the cavities, pores, and asperities of the solid surface to be the major factor in determining adhesive strength. One of the most consistent examples illustrating the contribution of mechanical anchoring […]

J. Schultz and M. Nardin Centre de Recherches sur la Physico-Chimie des Surfaces Solides, CNRS, Mulhouse, France There are agents in nature able to make the particles of joints stick together by very strong attraction and it is the business of experimental philosophy to find them out. —Sir Isaac Newton I. INTRODUCTION The adhesion phenomenon […]

There is a wealth of information available to the researcher on adhesives and sealants. Finding the exact item of interest on those materials, however, can be a daunting and very time-consuming task. There is no central collection point for this information. There are, literally, hundreds of companies that manufacture adhesives and sealants, there are dozens […]

Perhaps the most remarkable achievement of the last decade of the twentieth century was the growth of the Internet and access to it. Starting as a tool of the defense and academic establishments to facilitate scientific communication, the Internet has grown to encompass every segment of industry and society. There is an absolutely astonishing amount […]

Not only do hundreds of manufacturers (in the United States alone) produce a staggering array of hundreds of thousands of adhesives and sealants for every conceivable application in industry, but these same companies produce even more literature that describes these products. Brochures typically provide a summary of key products in the manufacturer’s line, but often […]