There is no single chemical name for plastic as it is a broad category of materials composed of long chains of repeating organic units. Plastics can be made from a wide variety of different monomers, including ethylene, propylene, styrene, and vinyl chloride, and can be further modified with additives to achieve different properties. Here are a few examples:

* Polyethylene (PE) is a plastic made from the monomer ethylene. It is a widely used plastic and is known for its toughness, flexibility, and resistance to chemicals and water.

* Polypropylene (PP) is a plastic made from the monomer propylene. It is also a widely used plastic and is known for its strength, rigidity, and resistance to heat.

* Polystyrene (PS) is a plastic made from the monomer styrene. It is a versatile plastic and can be used in a variety of applications, including food packaging, disposable cups, and toys.

* Polyvinyl chloride (PVC) is a plastic made from the monomer vinyl chloride. It is a durable and versatile plastic and is used in a wide range of applications, including pipes, flooring, and siding.