What are the characteristics of PVC, the role?
PVC (polyvinyl chloride), the simple structure of its monomer CH2 = CHCl
Chemical and physical properties:
Rigid PVC is one of the most widely used plastic materials.PVC is actually a vinyl polymer, its material is a non-crystalline material.PVC material in the actual use of often added stabilizer, lubricant, auxiliary processing agent , Colorants, impact agents and other additives. Has a non-flammability, high strength, weather resistance and excellent geometric stability of PVC on oxidants, reducing agents and strong acid has a strong resistance, but it can Strongly oxidized acid such as concentrated sulfuric acid, concentrated nitric acid corrosion and does not apply with aromatic hydrocarbons, chlorinated hydrocarbons in contact with the occasion.
PVC melting temperature during processing is a very important process parameter, if this parameter will lead to improper decomposition of the material. PVC flow characteristics are quite poor, its process range is very narrow. Especially large molecular weight PVC material is more difficult to process (this The material is usually added to the lubricant to improve the flow characteristics), so usually used are small molecular weight PVC material PVC shrinkage is quite low, generally 0.2 to 0.6%.
Polyvinylchloride (PVC)
The name is Polyvinylchlorid, the main ingredient is polyvinyl chloride, bright color, corrosion resistance, durable, due to the increase in the manufacturing process of plasticizers, anti-aging agent and other toxic auxiliary materials to enhance its heat resistance, toughness, extension Sex, etc., so its products generally do not store food and medicine.It is the world's favorite, quite popular and also widely used in a synthetic material. Its global use in a variety of synthetic materials in the second According to statistics, only one year in 1995, PVC production in Europe is about five million tons, while its consumption was 5.3 million tons in Germany, PVC production and consumption of an average of one Four hundred thousand tons.PVC is 4% growth rate in the world to be produced and applied in recent years, PVC growth in Southeast Asia is particularly significant, thanks to the Southeast Asian countries have the urgent need for infrastructure construction In a material that can produce a three - dimensional surface film, PVC is the most suitable material.
