Beginner Topic 1030 of 1102 Biochemistry, Environment & Industry

PVC

Polyvinyl chloride is a rigid or flexible plastic used in pipes.

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In-depth explanation of PVC

Polyvinyl chloride, PVC, is made by polymerising vinyl chloride monomer, CH2=CHCl. The chlorine atoms make the polymer rigid and fire resistant, and unplasticised PVC is used for pipes, window frames and siding. Adding plasticisers such as phthalates gives flexible PVC for cable insulation, flooring and medical tubing. Because PVC contains chlorine, incineration can release hydrogen chloride and dioxins, which requires controlled combustion and filtration. Vinyl chloride monomer is a known human carcinogen, so its production is carefully controlled.

Going deeper: PVC

Key ideas: Polyvinyl chloride from vinyl chloride, CH2=CHCl, by addition polymerization. Rigid PVC is used in pipes and window frames, plasticized PVC (with phthalates) is flexible in cables, hoses and flooring. The polar C-Cl bond gives strength and flame resistance. It releases HCl when burned or overheated.

Common mistakes and connections: Misconception: flexible and rigid PVC are different polymers; only additives differ. Concerns include vinyl chloride monomer being carcinogenic, phthalate leaching and dioxins from burning. Contamination with PVC ruins PET recycling. Links to halogenated compounds and plastic recycling code 3.

Visualization of PVC

Mass composition of the PVC repeat unit, C2H3Cl. More than half is chlorine, which makes the polymer rigid and fire resistant. The interactive lesson shows this as a live animation or chart.

Worked example and use case

Plumbing pipes are commonly made from rigid unplasticised PVC.

Frequently asked questions about PVC

What is PVC?

Polyvinyl chloride is a rigid or flexible plastic used in pipes.

Is PVC a beginner, intermediate or advanced topic?

PVC is a beginner topic in Biochemistry, Environment & Industry. It needs no earlier chemistry lessons and is a good starting point.

What should I learn before PVC?

Study these earlier topics in Biochemistry, Environment & Industry first: Plastics, Thermoplastics and Thermosets, Polyethylene.

What comes after PVC?

The next topics in Biochemistry, Environment & Industry are Nylon and Polyester.

Can I practise PVC with quizzes?

Yes. The interactive lesson includes a self-check question on PVC, and the Biochemistry, Environment & Industry quiz draws on every topic in this area.

Where PVC fits in Biochemistry, Environment & Industry

PVC is topic 55 of 127 in Biochemistry, Environment & Industry.

PVC