TABLE OF CONTENTS Engineering materials are a broad group of auxiliary materials subdivided into two subgroups according to their application. To the first subgroup belong materials intended to raise the productivity of technological processes. The second subgroup embraces engineering materials promoting trouble-free operation and extending the lifetime of machines and equipment.
Inhibited polymer materials of the first group are those used for in-process preservation and rust-inhibition of hardware. They are various kinds of films and coats, discussed previously in Chaps. 2 and 3, coolants and inhibited polymer containers. Engineering polymer materials assisting in operation without failure of machines include numerous kinds of glues, sealants and polymer CI carriers protecting hardware in sealed vessels. A specific place within this versatile group of engineering materials is occupied by polymer microcapsules abundant during both the processing of materials and the maintenance of machines.
The properties, structure and range of application of inhibited engineering service materials on a polymer base are considered below.
Glues are either liquid or solid (meltable) polymer compositions whose purpose is to create non-detachable joints of structural materials or their products.
Glue compositions in practice contact metal crystals and oxides formed on the surface layer of metal parts as well as adsorbed molecules of impurities and their transformation products. Thus, adhesive bonds formed in such joints acquire variable strength and water-repellent properties. Adhesive joints operating in aqua electrolytes are weakened by diffusion of the electrolyte into the glued seam (via, first of all, the seam butt) upon which these weak bonds...
