PVC (Polyvinyl Chloride) Chemical and Physical Properties Rigid PVC is one of the most widely used plastic materials. PVC material is a non-crystalline material. In actual use, PVC materials often add stabilizers, lubricants, auxiliary processing agents, pigments, impact resistance agents and other additives.
PVC is a polyvinyl chloride plastic with bright color, corrosion resistance, firmness and durability. Due to the addition of some toxic auxiliary materials such as plasticizers and anti-aging agents in the manufacturing process, its products generally do not store food and medicine.

PVC is actually a kind of vinyl polymer.
Simply put, an aqueous solution of salt undergoes chemical decomposition under the action of electric current. This process produces chlorine, caustic soda and hydrogen. Refining and cracking petroleum or gasoline can produce ethylene. When chlorine and ethylene are mixed, ethylene dichloride will be produced; ethylene dichloride can be converted into chlorinated vinyl, which is the basic component of polyvinyl chloride.
The polymerization process connects chlorinated vinyl molecules together to form a polyvinyl chloride chain. The polyvinyl chloride produced in this way is in the form of a white powder. It cannot be used alone, but it can be mixed with other ingredients to produce many products.
Chlorinated vinyl was first synthesized in the Justus von Liebig laboratory in 1835.
The polyvinyl chloride was synthesized by Baumann in 1872. However, it was not until the 1920s that the first commercial product of PVC was produced in the United States, and large-scale production began in Europe within the next 20 years.
Polyvinyl chloride has outstanding characteristics such as abundant raw materials (oil, limestone, coke, salt and natural gas), mature manufacturing technology, low price, and wide range of uses. It has become the second largest general-purpose resin in the world after polyethylene resin. 29% of the world’s total synthetic resin consumption.
Polyvinyl chloride is easy to process and can be processed by molding, laminating, injection molding, extrusion, calendering, blow molding, etc. Polyvinyl chloride is mainly used to produce soft plastic products such as artificial leather, films, and wire sheaths, as well as hard plastic products such as plates, doors and windows, pipes and valves.
Polyvinyl chloride is flame-retardant (flame retardant value above 40), high chemical resistance (resistant to concentrated hydrochloric acid, 90% sulfuric acid, 60% nitric acid and 20% sodium hydroxide), mechanical strength And the advantages of good electrical insulation.
But its heat resistance is poor, with a softening point of 80°C, it starts to decompose and change color at 130°C, and precipitate HCI.