Chlorinatedpolyvinylchloridepropertiesanduses

Chlorinated Polyvinyl Chloride (CPVC) is a new engineering plastic made from chlorinated modification of polyvinyl chloride (PVC) resin. The product is white or light yellow odorless, odorless, non-toxic loose granules or powder. After PVC resin is chlorinated, the irregularity of the molecular chain arrangement increases, the polarity increases, the solubility of the resin increases, and the chemical stability increases, which improves the material's heat resistance and resistance to acids, alkalis, salts, oxidants, etc. Corrosion performance. Improved the mechanical properties of the resin's thermal deformation temperature, the chlorine content increased from 56.7% to 63-69%, the Vicat softening temperature increased from 72-82 ℃ to 90-125 ℃, the maximum use temperature can reach 110 ℃, and the long-term use temperature It is 95 ℃, which is one of the few high-molecular polymer materials that can be used for a long time at higher temperatures and pressures. The mechanical properties are excellent. The tensile strength of CPVC is about 50% higher than that of PVC, which is higher than that of ABS resin and PP resin It is increased about 1 times, especially near 100 ℃, CPVC can still maintain very strong rigidity, which can fully meet the requirements for equipment and pipelines at this temperature. Good chemical resistance, CPVC not only has excellent chemical resistance at normal temperature, but also has good acid, alkali and chemical resistance at higher temperatures, which is far better than PVC and other resins. It can replace Traditional material to resist aggressive substances; excellent flame retardancy, CPVC has excellent flame retardant self-extinguishing, limit oxygen index is 60, has no flame dripping, limit flame diffusion and smoke generation; low thermal conductivity, CPVC The thermal conductivity is only 0.105KW / (mk). CPVC-processed heat-resistant pipes have less heat loss and can be insulated from heat. It is not affected by residual chlorine in the water. Polyolefin materials (such as PP and PE) may decompose when exposed to residual chlorine in water, while CPVC will Affected by residual chlorine in water, no cracks and drips will appear. Bacteria are not easy to multiply; because CPVC pipes are not affected by residual chlorine in the water, their inner walls are smooth and bacteria are not easy to breed. They will not only resist the erosion of all forms of bacteria, but also have resistance to general germicidal chemicals. Therefore, CPVC is a new engineering plastic with broad application prospects.