Property Characteristics Of PVC Wall Panels
The quality of the resin is characterized by particle size and particle size distribution, molecular weight and molecular weight distribution, apparent density, porosity, fish eye, thermal stability, luster, impurity content and free activity of powder. Suspension polymerization of the monomer is a micro-droplet suspension dispersed in the water phase, the choice of oil-soluble initiator is dissolved in the monomer, the polymerization reaction is carried out in these droplets, the polymerization reaction heat is absorbed by water in time, in order to ensure that these droplets are dispersed in beads in water, they need to be added into the suspension stabilizer, such as gelatin, polyvinyl alcohol, methyl cellulose, Hydroxyethyl cellulose and so on.PVC Wall Panels
The initiator uses organic peroxide and azo compounds, such as peroxide, dimethyl carbonate, two cyclohexyl carbonate, diethyl peroxide, dimethyl carbonate and azo nitrile, and so on, which are used in many different fields. Polymerization is carried out in a polymerization kettle with a blender. After polymerization, the material flows into the monomer recovery tank or the stripping tower. Then flow into the mixing kettle, washed and then centrifugal dehydration, drying the resin finished.PVC Wall Panels
Emulsion polymerization of the earliest industrial production of PVC method. In emulsion polymerization, in addition to water and vinyl chloride monomer, the addition of sodium alkyl sulfonate and other surfactants as emulsifier, so that the monomer dispersed in the water phase and milk liquid, to water-soluble potassium sulfate or ammonium persulfate initiator, but also can be used "oxidation-reduction" initiation system, polymerization process and suspension method is different.
Crystal Density (25 ℃): 1. $literal. PVC Wall Panels
The production of PVC molecular weight is generally within 50,000 $number million range, with a large number of dispersibility, molecular weight with the polymerization temperature decreased and increased. No fixed melting point, 80~85℃ began to soften, 130 ℃ into a viscoelastic state, 160~180℃ began to change to a viscous flow state. Have good mechanical properties, tensile strength of around 60MPa, impact intensity 5~10kj/m2.PVC Wall Panels