What temperature does plastic become a gas?

The temperature at which plastic becomes a gas varies depending on the type of plastic. Generally, most plastics begin to decompose and release gases at temperatures ranging from about 300°C (572°F) to 800°C (1472°F). For example, polyethylene can start to break down around 350°C (662°F), while polyvinyl chloride (PVC) can decompose at lower temperatures. It's important to note that plastics do not simply "gasify" but instead undergo thermal degradation, producing various volatile compounds.