| Formula / Notation | (C3H6)n |
|---|---|
| CAS Number | 9003-07-0 |
| Molecular Weight | Variable (polymer) |
| Melting Point | 130–171 °C |
| Boiling Point | Decomposes |
| Density | 0.855–0.946 g/cm³ |
| Solubility | Insoluble in water |
| Appearance | white translucent solid |
| Also Known As | PP; polypropene; isotactic polypropylene |
| Category | Polymers & Plastics |
What is Polypropylene?
Polypropylene (PP) is a thermoplastic addition polymer made from propylene monomers (–CH₂–CH(CH₃)–)n. It is one of the most versatile and widely used plastics, valued for its combination of stiffness, chemical resistance, and light weight. Polypropylene can be isotactic, syndiotactic, or atactic depending on the arrangement of methyl groups along the polymer chain, with isotactic PP being the most commercially important form.
Formula & Notation
IUPAC Name: poly(propylene)
Other Names / Synonyms: PP; polypropene; isotactic polypropylene
Properties & Characteristics
Physical Data
| Property | Value |
|---|---|
| Melting Point | 130–171 °C |
| Boiling Point | Decomposes |
| Density | 0.855–0.946 g/cm³ |
| Molecular Weight | Variable (polymer) |
| Solubility | Insoluble in water |
| Appearance | white translucent solid |
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
Polypropylene (PP) is a thermoplastic addition polymer made from propylene monomers (–CH₂–CH(CH₃)–)n. It is one of the most versatile and widely used plastics, valued for its combination of stiffness, chemical resistance, and light weight. Polypropylene can be isotactic, syndiotactic, or atactic depending on the arrangement of methyl groups along the polymer chain, with isotactic PP being the most commercially important form.
Packaging containers and closures. Automotive parts (bumpers, interior trim). Textile fibres and carpets. Medical syringes and laboratory ware. Pipes and fittings. Hinged caps and living hinges.
Generally non-toxic and considered safe for food contact. Releases fumes when melted or burned. Not biodegradable. Consult SDS for specific grades and additives before processing.
The formula or notation for Polypropylene is: (C3H6)n