Raw materials: The main raw materials of Pvi /pvp copolymer include N-vinylpyrrolidone (NVP) and 1-vinylimidazole (VI) . These raw materials need to be carefully prepared and screened to ensure their purity and quality.
Polymerization reaction: mixture of raw material and initiator, added into the reactor, and polymerization reaction. The polymerization reaction can be carried out by solution polymerization, suspension polymerization or emulsion polymerization. In the process of reaction, need to control the appropriate temperature, pressure and reaction time, to ensure the effect and yield of polymerization.
Separation and purification: After the polymerization, needs to be separated from the polymer for purification. The commonly used separation methods are solvent precipitation, distillation and concentration, etc. By these methods, can remove impurities and other by-products, to obtain relatively pure Pvi /pvp copolymer products.
Drying and crushing: the separated and purified Pvi /pvp copolymer products need to be dried and crushed. drying can be carried out by oven or spray drying, to remove the water, to make the Pvi /pvp copolymer product to get the appropriate moisture content. and grinding is the use of mechanical equipment to grind Pvi /pvp copolymer products into powder, for subsequent processing and use.
Packaging and storage: The dried and crushed Pvi /pvp copolymer product shall be packaged and stored. The commonly used packaging materials are plastic bags, plastic buckets or cartons, can be according to different needs to choose the right packaging. In the storage process, needs to pay attention to the moisture, dust, fire and corrosion prevention of Pvi /pvp copolymer, to ensure its quality and stability.
The above are the basic steps of Pvi /pvp copolymer synthesis, each step needs to strictly control various parameters and operating conditions, to ensure the quality and stability of Pvi /pvp copolymer products.
