Question: what is the difference between polypropylene and polyethylene?
Answer: Monomer of polyethylene is ethylene and monomer of polypropylene is propylene. ... Polypropylene is not as sturdy as polyethylene. Polypropylene is stiffer and resistant to chemicals and organic solvents compared to polyethylene. Polypropylene is pure, non-stretching and generally more rigid than polyethylene.