Represented by the AAA plastic source, the current is mainly made of a plastic oil and gas two materials, which after cracking process to form a monomer, and then polymerizing the monomer into a polymer - plastic.
The plastic source uses AAA to indicate that the plastic is mainly made of oil and gas two raw materials, which are formed by the cracking process, and then polymerized by monomer into polymer-plastic. ...
The source of plastics is AAA. At present, plastics are mainly made of two kinds of raw materials, oil and natural gas. They are cracked to form monomers, which are then polymerized into polymer plastics.