Лако-красочные материалы — производство

Interfacial bonding studies have attracted the attention of many workers using a variety of spectroscopic techniques. Evidence for coupling activity has been demonstrated in the cases shown in Table 1. II. MECHANISM OF ADHESION PROMOTION Mechanistic theories of adhesion promotion have been described in detail by Rosen [11] with sole reference to silanes, but it […]

Peter Walker Atomic Weapons Establishment Pic, Aldermaston, Berkshire, England I. INTRODUCTION It is axiomatic that the paramount property of an adhesive is adhesion to the substrate, but adhesion is also critical in the performance of surface coatings, which must adhere to protect and in obtaining optimum mechanical properties in particulate — and fiber — filled […]

One hundred years ago, Sir William Crookes stated: “Investigation of the fourth state of matter—plasma—will be one of the most challenging and exciting fields of human endea­vor.” Plasma technology today is gaining increasing acceptance and recognition as an important industrial process for the surface modification of materials. Plasma processing is not one process but a […]

In comparison to the processes described above, plasma polymerization offers an entirely new avenue for adhesion improvement when bonding different materials. For example, films deposited from a methane plasma have been shown to improve dramatically the adhesion properties of many materials when tested in both the dry and wet state [41]. The process of plasma […]

As effective as these surface modification processes might be, they present limitations in terms of the extent to which the surfaces of polymers can be modified. Plasma-induced grafting offers another method by which chemical functional groups can be incorporated. In this process, free radicals are generated on the surface of a polymer through the use […]

The use of plasma surface treatment to improve adhesion is well known [5-19] and several literature sources provide an in-depth discussion of the nature of gas plasmas and their chemistries [1,5,7,10-12]. Although any gas can be ionized using RF excitation, gases such as O2, N2, He, Ar, NH3, N2O, CO2, CF4, and air or some […]

The strength of an adhesive joint is influenced by several factors [2-4]. Removal of con­taminants and process aids provides a means for the adhesive to interlock with the sub­strate surface rather than with a boundary layer that is merely resting on the surface. Increasing the surface energy of the substrate above the surface tension of […]

A. Plasma Processes There are many definitions of the term plasma, according to the various disciplines with which it is involved. It has often been referred to as the fourth state of matter; the generation of plasma being analogous to the transitions that occur when energy is supplied to a material, causing solids to melt […]

While most, if not all, plasma equipment consists of similar components, the design of the reactor chamber, the distribution of power, the excitation frequency, and the gas dynamics can all be critical parameters influencing the efficiency and properties of plasma reactions. An extensive amount of work has been published that shows a direct correlation between […]

Om S. Kolluri HIMONT Plasma Science, Foster City, California, U. S.A. I. INTRODUCTION Adhesion, whether the bonding of polymers or the adhesion of coatings to polymer surfaces, is a recurring and difficult problem for all industries that use these materials as key components in their products. Designers must often select specially formulated and expensive polymeric […]