Polypropylene
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Polypropylene, also known as polypropene, is a thermoplastic polymer used in a wide variety of applications. It is produced via chain-growth polymerization from the monomer propylene.
Effect of UV exposure on polypropylene rope
Polypropylene lid of a Tic Tac box, with a living hinge and the resin identification code under its flap
A chair with a polypropylene seat
Polypropylene items for laboratory use. Blue and orange closures are not made of polypropylene.
Polyethylene
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Polyethylene or polythene is the most commonly produced plastic. It is a polymer, primarily used for packaging. As of 2017, over 100 million tonnes of polyethylene resins are being produced annually,
Polypropylene
…from the monomer propylene. Polypropylene belongs to the group of polyolefins and is partially crystalline and non-polar. Its properties are similar to polyethylene, but it is slightly harder and more heat-resistant. It is a white, mechanically rugged material and has a high chemical resistance. Polypropylene is…
Sample of granulated polyethylene
Carbon fiber bundle
A pill box presented to a technician at ICI in 1936 made from the first pound of polyethylene
Stainless steel and ultra-high-molecular-weight polyethylene hip replacement