Polyvinyl chloride (PVC) is mainly classified
PVC material is PVC, it is a very useful material, often used in our life. Such as PVC pipe, PVC flooring, PVC wallpaper and so on. India market demand for PVC is increasing year by year, the future of India added PVC will continue to rely on imports. 1, the classification of polyvinyl chloride (PVC)
different method of production, PVC can be divided into: general type, high polymerization degree PVC resin, PVC resin crosslinked PVC resin. Universal PVC resin is made under the action of the initiator, polymerization of vinyl chloride monomer; High polymerization degree PVC resin refers to join in vinyl chloride monomer polymerization system of chain extension agent polymerization resin; Crosslinked PVC resin is added in vinyl chloride monomer polymerization system containing dienes and polyene crosslinking agent of polymerization of resin.
according to the acquiring method of vinyl chloride monomer to differentiate, can be divided into calcium carbide method, ethylene method and imports ( EDC、VCM) Monomer ( Traditionally called ethylene teaching method and the import monomer ethylene method) 。
according to polymerization methods, PVC can be divided into four categories: PVC suspension method, emulsion PVC, polyvinyl chloride, solution method of ontology. Polyvinyl chloride (PVC) suspension method is big a variety of output accounted for about 80% of the total PVC production.
2, the naming of polyvinyl chloride (PVC)
polyvinyl chloride (PVC) suspension method according to the viscosity in six models: XS - 1,x - 2……XS- 6; XJ - 1,XJ - XJ - 2…… 6. Model: the meaning of each letter in the X-ray Suspension method; S - Loose type; J - Close; The chart below for the characteristics of domestic PVC suspension method.
ontology method of polyvinyl chloride (PVC) [ palyvinyl chloride( 本体聚合) ] Existing production in China, sichuan yibin day, Inner Mongolia haiji two enterprises, the product transparency and insulation is higher than other methods. Solution polymerization of polyvinyl chloride resin used in surface coating. In the degree of temperature below 20 ~ 30 ℃ and 0 ℃ under the low temperature of suspension, emulsion or its method of polymerization are called polymerization at low temperature. Low temperature polymerization of polyvinyl chloride of high molecular weight, high crystallinity and regularity of the structure is good, high glass transition temperature, thermal stability, good solvent resistance. But is more difficult than ordinary PVC processing, slightly lower impact strength, is used as fiber and special plastic products.
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