Polyvinyl Chloride Resin
Introduction
Polyvinyl chloride resin is a polar non-crystalline polymer, there is a strong force between the molecules, is a hard and brittle material;Low impact strength.After adding the impact modifier, the elastomer particles of the impact modifier can reduce the total stress induced by the silver grain, and prevent the expansion and growth of the silver grain by using the deformation and shear band of the particles themselves, thus absorbing the impact energy in the body of the transmission material, so as to achieve the purpose of impact resistance.The particle size of the modifier is very small, which is conducive to increasing the amount of modifier per unit weight or per unit volume, so as to increase the effective volume fraction and thus enhance the ability of dispersing stress.At present, it is widely used as an organic impact modifier.
Performance:polyvinyl chloride resin (PVC) is one of the important organic synthetic materials.The poly2-CHCL n has excellent physical and chemical properties, and is widely used in industry, construction, agriculture, daily life, packaging, electricity, public utilities, etc.
Physical properties:polyvinyl chloride resin, physical appearance of white powder, non-toxic, odorless.Relative density is 1.35-1.46, refractive index is 1.544 (20℃), insoluble in water, gasoline, alcohol and vinyl chloride, soluble in acetone, dichloroethane, xylene and other solvents, high chemical stability, with good plasticity.In addition to a few organic solvents, room temperature can withstand any concentration of hydrochloric acid, sulfuric acid under 90%, 50-60% nitric acid and 20% less caustic soda, in addition, is also quite stable for salts;PVC on the flame can burn and release HCl, but left the flame is self-extinguishing, is a kind of “self-extinguishing”, “non-combustible” material;PVC starts to decompose above 100℃ and slowly releases HCl. As the temperature rises, the decomposition and release speed of HCl are accelerated, resulting in the discoloration of PVC.
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