Manufacturing of plastics: Plastic manufacturing consists of four categories. The first is the acquiring of the raw materials. The monomers, simple compounds of carbon that make of polymer chains, are obtained from petrochemicals. These petrochemicals are widely available and tend to be cheaper than other raw materials. The second step is synthesising of the basic polymers that have been created from the monomers. This can be obtained through addition or condensation reactions. After this process …showed first 75 words of 989 total…

…showed last 75 words of 989 total…kind that can melt. Thermosetting plastics cannot be melted. But they can be ground up into powders or shredded. In conclusion plastics have changed our lives a great deal. Many things in today's world are made of plastic from Lego pieces to computer parts to aeroplane and car parts. Ever since plastics started they began to grow and improve. There is no doubt that in the future they will only continue to grow and improve.