Pvc Fence Introduced Pvc Composition Of The Structure

In the production of PVC Fence added PVC ingredients make PVC Fence corrosion resistance, impact resistance, pressure resistance, there is a strong cold hardiness. PVC is a PVC material, which is one of the largest plastic products in the world. It is cheap and widely used. The polyvinyl chloride resin is white or light yellow powder. According to different purposes can be added to different additives, PVC plastic can show different physical and mechanical properties. In polyvinyl chloride resin by adding the right amount of plasticizer, can be made of a variety of hard, soft and transparent products.

Pure PVC density of 1.4g / cm3, adding plasticizers and fillers PVC plastic parts such as density is generally 1.15-2.00g / cm3. Rigid PVC has good tensile strength, bending, compressive strength and impact resistance, can be used alone structural materials. Flexible soft PVC, elongation, cold resistance will increase, but brittle, hardness, tensile strength will be reduced. PVC has good electrical insulation properties, can be used for low-frequency insulation materials, its chemical stability is good and so on. Due to poor thermal stability of PVC, prolonged heating will cause decomposition, HCL gas release, so that PVC discoloration, therefore, its application is very narrow, the use of temperature is generally between -15 to 55 degrees.

pvc fence introduced pvc composition of the structure:

Polyvinyl chloride is a polymer material that uses one chlorine atom instead of one hydrogen atom in polyethylene and is an amorphous polymer containing a small amount of crystalline structure. The structure of this material is as follows: [-CH2-CHCl-] n. PVC is a linear polymer with most head-to-tail structures associated with VCM monomers. Carbon atoms arranged in a zigzag pattern, all atoms are connected by σ bond. All carbon atoms are sp3 hybridized.

There is short syndiotactic regular structure in PVC molecular chain. As the polymerization temperature decreases, the syndiotacticity increases. Polyvinyl chloride macromolecular structure exists in the head structure, branched, double bonds, allyl chloride, tertiary chlorine and other unstable structure, making the deformation and aging resistance poor shortcomings. So for cross-linked, you can eliminate such shortcomings.

Crosslinking is divided into radiation crosslinking and chemical crosslinking.

1. Radiation cross-linked. The use of high-energy radiation, generally cobalt 60 radiation generated by electron or electron radiation generated by accelerated, the main use of the latter. In addition, cross-linking is assisted by a crosslinking aid (a monomer having two or more carbon-carbon double bond structures). However, the operation is difficult and requires high equipment.

Chemical cross-linking The use of triazole dimercaptoamine salt (FSH) for crosslinking, crosslinking mechanism for the combination of amine and mercapto attack carbonochromic polar substitution reaction. Cross-linked products UV resistance, solvent resistance, temperature resistance, impact toughness and other properties will be fully enhanced.