Polymer plastic polyurethane is a type of League, raphi is used because it is cheap, synthetic, petroleum may be obtained from using ziegler-type catalyst, which has the chemical structure image 1.
Polypropylene is a plastic polymer that has been used as a kind of cheap. It can be synthesized from cheap petroleum using ziegler-type catalyst which has a chemical structure as shown in Figure 1.
Polypropylene is a kind of plastic that has many uses because cheap. Because it can be synthesized from petroleum by using ziegler-type catalyst cheap which has a chemical structure as the quality 1.