Commonly used materials for fireworks: 21. Properties of polyvinyl chloride

Materials commonly used in fireworks: 21. Properties of polyvinyl chloride

English name polyvinyl chloride; molecular formula [C2H3CI]. The relative molecular weight is 62.5.This article comes from: https://fireworkslit.com/Fireworkslit-https://fireworkslit.com/commonly-used-materials-for-fireworks-21-properties-of-polyvinyl-chloride/

1. Physical and chemical properties. Appearance and properties: white or light yellow powder; Relative density (water = 1): 1.41; Maximum explosion pressure: 0.76 MPa; Solubility: insoluble in petroleum ether, soluble in water.
   

   Polyvinyl chloride

2. Health Hazards. Dust and vinyl chloride monomer can be present in the production of polyvinyl chloride. Inhalation of vinyl chloride monomer gas can cause anaesthetic symptoms, which can be fatal in severe cases. Long-term inhalation of vinyl chloride can cause neurasthenia syndrome, digestive symptoms, hepatosplenomegaly, scleroderma-like changes in the skin, and osteolysis of the extremities. Long-term inhalation of vinyl chloride at high concentrations may result in hepatic hemangiosarcoma. Long-term inhalation of polyvinyl chloride dust can cause changes in lung function.
3. Hazardous properties. Powder and air can form explosive mixtures, when it reaches a certain concentration, it will explode when it meets sparks. Decomposition by high heat produces toxic and corrosive fumes.
4. Leakage emergency treatment. Isolate the leakage contaminated area, restrict access and cut off the source of fire. It is recommended that emergency personnel wear dust masks (full face masks) and anti-virus clothing. Avoid raising dust. If a small amount of leakage, carefully sweep up, put in a bag and transfer to a safe place. If a large amount of leakage, cover with plastic sheet, canvas, etc., collect and recycle or transport to the waste disposal site for disposal.
5. Fire extinguishing methods. Move containers from the fire to an open area if possible. Extinguishing agents: mist water, foam, dry powder, carbon dioxide, sand, etc. Fireworks commonly used pyrotechnic materials: properties of polyvinyl chloride