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Jul 05,  · This ubiquitous material is designed to be very durable – and as a result much of it doesn’t biodegrade. Depending on the type, plastic can take between a few decades to potentially millions.

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In chemical terms, polystyrene is a long chain hydrocarbon wherein alternating carbon centers are attached to phenyl groups (a derivative of benzene).Polystyrene's chemical formula is (C 8 H 8) n; it contains the chemical elements carbon and hydrogen.. The material's properties are determined by short-range van der Waals attractions between polymers chains.. Since the .