Production Of Polymers
Of plastics are non-metallic materials based on natural and synthetic polymers and processed into products by plastic deformation. PCRM contributes greatly to this topic. For polymers are natural or synthetic resins. Production of polymers made from the products of coal, oil and other natural materials. Plastics are composed of: binders, fillers, plasticizers, dyes and other additives. Resins are the basis of plastics and determine their main properties. In the manufacture of polymers, fillers are used to make plastic mass strength, hardness and other qualities.
Fillers can be organic and inorganic. Organic fillers are paper, cotton waste, wood flour, cotton, cellulose, wood veneer. As inorganic fillers used mica fiberglass, asbestos, silica, fiberglass, graphite. Dyes stain plastics as well as its basis a certain color. Applied as mineral pigments (mummy, ocher, umber), and organic. The composition plastics often include special additives, which influence the quality of plastics, such as stabilizers – the substances that prevent the decomposition of pvc during processing and use under the influence of atmospheric conditions, high temperatures and other factors. Plastics differ significantly lower density compared to metals (1, 1, -1, 8 t / m 3), so the strength of some plastics is approaching strength of the metal.
Tensile strength of fiberglass slightly less than steel ST5. Replacement of metal in construction reduces the weight of poly and metal products. Plastics have only high plasticity, because of this complexity of manufacturing complex parts on the basis of plastics is much less labor manufacturing details of the other. Although the plastic properties of these materials manifest themselves in different ways. Some of them during the solidification of losing their plasticity, and can not be softened again by heating. Other plastics (thermoplastic) can again be softened and used again.