Knowledge

Before the 1960s, the production of monomeric vinyl chloride was basically based on calcium carbide acetylene, because calcium carbide production requires a lot of electricity and coke, and the cost i

PVC was industrialized in the early 1930s. Since the 1930s, for a long time, the production of polyvinyl chloride has been the first in the world's plastic consumption. In the late 1960s, polyethylene

According to the content of plasticizer, PVC plastics are often divided into: non-plasticized PVC, plasticizer content is 0; rigid PVC, plasticizer content is less than 10%; semi-rigid PVC, plasticize

According to the method of obtaining vinyl chloride monomer, it can be divided into calcium carbide method, ethylene method and imported (EDC, VCM) monomer method (the ethylene method and the imported

According to the different scope of application, PVC can be divided into: general PVC resin, high degree of polymer i zation PVC resin, cross-linked PVC resin. General-purpose PVC resin is formed by t

Triazole dimercaptoamine salt (FSH) is used for cross-linking. The cross-linking mechanism is that amine and sulfhydryl combine to attack carbon-chlorine polar bonds to carry out substitution reaction

High-energy rays are used, generally the rays generated by cobalt 60 radiation sources or the electron rays generated by electron acceleration, and the latter is mainly used. Then add a crosslinking a

There is a short syndiotactic stereoregular structure on the PVC molecular chain. As the polymerization temperature decreases, the syndiotactic tacticity increases. In the macromolecular structure of

Polyvinyl chloride is a polymer material that uses one chlorine atom to replace one hydrogen atom in polyethylene, and is an amorphous polymer with a small amount of crystalline structure. The structu

Referred to as PVC, it is a thermoplastic resin polymerized from vinyl chloride under the action of an initiator. It is a homopolymer of vinyl chloride. Vinyl chloride homopolymers and vinyl chloride

The molecular weight of industrially produced PVC is generally in the range of 50,000 to 110,000, with a large polydispersity, and the molecular weight increases with the decrease of the polymerizatio

Because LDPE and HDPE have good fluidity, low processing temperature, moderate viscosity, low decomposition temperature, and do not decompose at high temperature of 300 ℃ in inert gas, they are plasti