: Polypropylene (PP), 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.
: P 3990 (OTTO) Polypropylene, isotactic average, Mw ~340,000 average Mn ~97,000 Cas 9003-07-0 - used for plastic pipework, is a new form of this plastic.