A single definition does not exists for a plastic but in a confined and very brief form we can say that it is any one of a large and varied group of materials which consists of or contains as an essential ingredient, combinations of Carbon with Oxygen, Hydrogen, Nitrogen and various other organic and inorganic elements. The finished product which is in solid phase (say) is formed into various shapes, by flow, usually through the application, singly or together, of heat and pressure. Also these are capable of being readily formed into many shapes.
Most of the Plastics are synthetically manufactured and only a few occur naturally i.e. sutta, percha, natural rubber and some other types of vegetable waxes. Principal elements in the formation of plastics are carbon, nitrogen, hydrogen and oxygen. These are derived from petroleum, coal, salt, air and water.
Initially the plastics are monomeric, resinous compounds composed of small, single molecules but under the influence of heat or a combination of heat and pressure, or of chemical catalysts, these small molecules combine to form polymeric compounds giving rise to solid or semi-solid structure.
Pigments for Plastics & Rubbers
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Blog written by Qualitron Chemicals
(manufacturer of Organic Pigment & Phthalocyanine)