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What is the difference between PVC, ABS, PP, PE plastic materials(IV) Sep 28, 2020
PVC: polyvinyl chloride

It is a polymer material that uses a chlorine atom to replace a hydrogen atom in polyethylene.

The biggest feature of PVC is flame retardant, so it is widely used in fire protection applications. But PVC will release hydrochloric acid and other toxic gases during the combustion process.

Structural formula: -CH2-CHC1-CH2-CHC1-CH2-CHC1-

POM: Polyoxymethylene

The scientific name is polyoxymethylene, which is a thermoplastic polymer. The English abbreviation is POM. The structural formula is CH-O. Before 1942, most of the polyoxymethylene glycol HOCHOH obtained by the polymerization of formaldehyde was the polyoxymethylene glycol HOCHOH, which has a low degree of polymerization and is easy to be depolymerized by heat. It is polyoxymethylene. Around 1955, DuPont of the United States polymerized formaldehyde to obtain a homopolymer of formaldehyde, namely homopolyoxymethylene, with the trade name Delrin. Celanese Corporation of the United States started from trioxane and prepared a copolymer with a small amount of dioxane or ethylene oxide, that is, polyoxymethylene copolymer, with the trade name Celcon.

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