Polypropylene

Polypropylene (PP)
Polypropylene isotactic
Polypropylene isotactic
Polypropylene syndiotactic Pp
Polypropylene syndiotactic 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
ChemSpider
ECHA InfoCard 100.117.813
UNII
Properties
is (C3H6)n
Density 0.8550 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).
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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.

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

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