Introducing the Book "Plastics and the Environment"

Plastics are produced by molding, extrusion forming, and rolling, and exist in the form of solid parts, coverings, coatings, foam, fibers, and thin films. Plastics are organic materials with high molecular weight that can take various forms; some of them are found naturally, but most of them are obtained synthetically. In general, plastics, compared with metals and alloys, are much weaker, softer, more resistant to the ions of hydrochloric acid, less resistant to oxidizing ions such as nitric acid and to solvents, and also have a lower thermal limit.   The properties of plastics can be changed considerably by adding plasticizers, hardeners, and fillers; on the other hand, plastics, unlike metals, do not corrode.   https://irannashr.com/main/product/%d9%be%d9%84%d8%a7%d8%b3%d8%aa%db%8c%da%a9-%d9%88-%d9%85%d8%ad%db%8c%d8%b7-%d8%b2%db%8c%d8%b3%d8%aa/