What are two main groups of plastic?

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polymers and monomers
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What are the two main types of plastics?

1. Polyethylene. 2. Polyester. These are the main two types of plastics;there may be many more plastics lying on the grounds of this big chunk of land[EARTH].

What two main elements do plastics contain?

Carbon and hydrogen.. Many kinds of plastics, such as pure natural rubber (polyisoprene), polyethylene, polystyrene, polypropylene, etc., are composed entirely of carbon and

What are the two main groups of bacteria?

The two main groups of bacteria are archaebacteria and eubacteria.Archaebacteria are typically found in extreme environments. Thistype of bacteria includes methanogens (the ty