When hot water is placed into anempty water bottle the bottle keeps its shape and does not soften Wh...........

General Science (CDS) Chemistry

When hot water is placed into anempty water bottle, the bottle keeps its shape and does not soften. What type of plastic is the water bottle made from?

Thermoplastic

PVC

Polyurethane

Thermosetting

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Explanation:

Thermoset, or thermosetting, plastics are synthetic materials that strengthen during being heated, but cannot be successfully remoulded or reheated after their initial heat-forming. This contrasts with thermoplastics, which soften when heated and harden and strengthen after cooling. Thermoplastics can be heated, shaped and cooled as often as necessary without causing a chemical change, while thermosetting plastics will burn when heated after the initial moulding.