Polypropylene

Polypropylene (PP)

Names
IUPAC name Poly(1-methylethylene)
Other names Polypropylene; Polypropene; Polipropene 25 [USAN]; Propene polymers; Propylene polymers; 1-Propene; [-Ch2-Ch(Ch3)-]n
Identifiers
CAS Number	9003-07-0 Y
ChemSpider	None
ECHA InfoCard	100.117.813
UNII	1ASA949VIC Y
CompTox Dashboard (EPA)	DTXSID00872805
Properties
Chemical formula	(C3H6)n
Density	0.855 g/cm3, amorphous 0.946 g/cm3, crystalline
Melting point	130 to 171 °C (266 to 340 °F; 403 to 444 K)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Y verify (what is YN ?) Infobox references

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.

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.^[1]

Polypropylene is the second-most widely produced commodity plastic (after polyethylene).