PVC resin is white or light yellow powder, which cannot be used alone and must be modified. PVC is a white powder with amorphous structure, with low branching degree and poor stability to light and heat. Different additives can be added according to different uses, and PVC plastics can show different physical and mechanical properties. Adding a proper amount of plasticizer into PVC resin can make various hard, soft and transparent products.
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PVC was first discovered by the famous French scientist Henri Victor Raignault in 1835. Then in 1872, another German scientist (Eugen Baumann) also discovered this new material. At that time, pvc was a white solid, very fragile and had no practical use. At the beginning of the 20th century, a group of chemists, such as Ivan Ostromislensky and Fritz Klatte, tried to change the brittleness of pvc and make it a commercial product, but they all failed.
It was not until 1926 that Waldo Semon(B.F. Goodrich Company) in the United States synthesized pvc and applied for a patent in the United States. He solved the brittleness of pvc by synthesizing a variety of additives, increased the expansibility of PVC materials, and made it have the basis for product commercialization.
193 1 year, Germany began to produce pvc by emulsion method, 194 1 year, and the United States began to produce pvc by suspension method, so pvc materials related products began to be widely used in production and life fields. With the continuous development of science and technology, the production and synthesis of PVC has been replaced by bulk synthesis, with higher efficiency and greatly reduced cost.
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