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Polyvinyl chloride (PVC) physical and chemical properties

by:SYJ     2020-10-19

stability; Not easily by acid, alkali corrosion; Comparison on heat tolerance

polyvinyl chloride (PVC) with a flame retardant ( Flame retardant value of more than 40) , high resistance to chemicals ( Resistance to strong hydrochloric acid, sulfuric acid concentration is 90%, the concentration of 60% concentration of nitric acid and 20% sodium hydroxide) The advantages of, good mechanical strength and electrical insulation.

polyvinyl chloride (PVC) light and heat stability was poor. Softening point is 80 ℃, 130 ℃ starts to break down. Without heat stabilizers, polyvinyl chloride (PVC) 100 ℃ which began to decompose, above 130 ℃ break down faster. Thermal decomposition of release hydrogen chloride gas, Hydrogen chloride is toxic gas) Make a change, from white to pale yellow, red to brown, black. The ultraviolet ray in sunshine and oxygen can make PVC light oxidation decomposition, thus make the flexible PVC drops, the brittle. From here, it is easy to understand why some PVC plastic over time will become yellow, brittle.

has stable physical and chemical properties, insoluble in water, alcohol, petrol, gas, water leakage is low; At room temperature can be resistant to any concentration of 50-90% hydrochloric acid, sulfuric acid, under Under 60% nitric acid and 20% caustic soda solution, have a certain resistance to chemical corrosion resistance; Salts are quite stable, but fat can dissolve in ether, ketones, chlorinated hydrocarbon and aromatic hydrocarbon solvents.

HPVC/SBR blend thermoplastic elastomer

HPVC/SBR blend thermoplastic elastomer

industrial polyvinyl chloride (PVC) resin are main crystalline structure, but also contains some crystalline regions ( About 5%) , so the melting point of PVC without apparent, about 80 ℃ or so began to soften, heat distortion temperature ( 1. 82 mpa under load) For 70 - 71 ℃, 150 ℃ under pressure to flow, to movement, and began to slowly release hydrogen chloride, PVC color ( Change from yellow to red, brown, or black) 。

industrial polyvinyl chloride (PVC) were relative molecular mass in 4. 8 - 4. 80000 within the scope of the corresponding number average molecular weight of 2 - 1. 950000. And the vast majority of the industry were relative molecular mass of the resin in 10 - In 200000, the number average relative molecular mass and 4. 55 - 6. 40000. Rigid PVC ( Without plasticizer) Has a good mechanical strength, weather resistance and flame resistance, and can be used as structural material, separately on the application in chemical pipes, sheet and injection molding products. Rigid PVC reinforced material can be used.

yangzhou plastic co. , LTD. Is mainly involved in the PET sheet, PET transparent sheet, PET coil, PET anti-fog, PET antistatic pills, PET sheet, PET plastic, PET clothing template, PVC sheet, PVC transparent sheet, PVC coil, PVC sheet, PVC profile, PVC film, GAG sheet, RPET sheet, PET blister box folding sheet, PVC blister box folding sheet, APETG sheet, APETG blister, folding boxes, sheet, etc.


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