What is PVC Raw Material?
What is PVC Raw Material?
The essential raw materials for PVC are derived from salt and oil. The electrolysis of salt water produces chlorine, which is combined with ethylene (obtained from oil) to form vinyl chloride
How is PVC made?
The chemical process for making PVC involves taking the simplest unit, called the monomer, and linking these monomer molecules together in the polymerisation process. Long molecular chains are formed called polymers (which are also called macromolecules).
This is the case for PVC, which is made from vinyl chloride monomer known usually by its initials VCM through polymerisation. Some monomers exist in the form of reactive gaseous chemical substances, and some of these may cause health hazards when in direct contact with humans. In these cases they are manufactured and processed under strict control for health, safety and environmental protection. On the other hand, polymers such as PVC, which are manufactured from monomers through polymerisation, are solid and chemically stable substances, therefore do not affect human health. VCM, which is the raw material for PVC, is a gas at ambient temperature but is usually stored in liquid form under pressure. Ethylene and chlorine are raw materials for PVC. Upstream industries are those that provide these materials and include producers of basic petrochemicals (sometimes known as feedstock, which supply ethylene, and the chlor-alkali (caustic soda) industry, which supplies chlorine.
Most commodity plastics have carbon and hydrogen as their main component elements. PVC differs by containing chlorine (around 57 per cent by weight) as well as carbon and hydrogen. The presence of chlorine in the molecule makes PVC particularly versatile because it makes i compatible with a wide range of other materials. The chlorine content also helps to make PVC flame retardant. It can also be used as a marker to distinguish PVC in automatic sorting systems for plastics recycling. PVC formulations can be shaped by a variety of techniques and, using very little energy, made into the final product form. PVC polymer is chemically stable, neutral and non-toxic. PVC formulations have a wide range of applications including the most sensitive, such as medical equipment, plus construction, automotive and electrical cabling.
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