| Formula / Notation | (C2H4)n |
|---|---|
| CAS Number | 9002-88-4 |
| Molecular Weight | Variable (polymer) |
| Melting Point | 120–140 °C (LDPE); 130–137 °C (HDPE) |
| Boiling Point | Decomposes |
| Density | 0.910–0.965 g/cm³ |
| Solubility | Insoluble in water |
| Appearance | white to translucent solid |
| Also Known As | PE; polythene; polyethene; HDPE; LDPE; LLDPE |
| Category | Polymers & Plastics |
What is Polyethylene?
Polyethylene (PE) is the world's most widely produced synthetic plastic. It consists of long chains of ethylene monomers (–CH₂–CH₂–)n and is produced by addition polymerisation. It exists in several forms including high-density polyethylene (HDPE), low-density polyethylene (LDPE), and linear low-density polyethylene (LLDPE), each with different physical properties determined by chain branching and crystallinity.
Formula & Notation
IUPAC Name: poly(ethylene)
Other Names / Synonyms: PE; polythene; polyethene; HDPE; LDPE; LLDPE
Properties & Characteristics
Physical Data
| Property | Value |
|---|---|
| Melting Point | 120–140 °C (LDPE); 130–137 °C (HDPE) |
| Boiling Point | Decomposes |
| Density | 0.910–0.965 g/cm³ |
| Molecular Weight | Variable (polymer) |
| Solubility | Insoluble in water |
| Appearance | white to 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
Polyethylene (PE) is the world's most widely produced synthetic plastic. It consists of long chains of ethylene monomers (–CH₂–CH₂–)n and is produced by addition polymerisation. It exists in several forms including high-density polyethylene (HDPE), low-density polyethylene (LDPE), and linear low-density polyethylene (LLDPE), each with different physical properties determined by chain branching and crystallinity.
Packaging films, bags, and containers. Plastic bottles and caps. Pipes and fittings. Cable insulation. Geomembranes. Toys and household goods. Medical devices and implants.
Generally considered non-toxic and chemically inert in solid form. Can release fumes when processed at high temperatures. Not biodegradable. Some forms may contain additives. Consult SDS for specific formulations before industrial processing.
The formula or notation for Polyethylene is: (C2H4)n