PEO / PEG
Polyethylene Oxide / Glycol
Glass Transition (Tg)
-60 to -50 °C
Melting Point (Tm)
~65 °C
Density
1.13 g/cm³
CAS Number
25322-68-3
Recycling Code
♺ 7
Category
Functional & Smart
Repeat Unit
–[CH₂–CH₂–O]ₙ–
The repeating unit is the smallest structural fragment whose repetition builds the whole chain. Subscripts show the relative share of each unit in copolymers.
Key Properties
Water-soluble and highly biocompatible; PEGylation of drugs creates a hydration shell that evades immune clearance and extends circulation time; also conducts Li⁺.
Applications
Drug PEGylation, solid polymer electrolytes, hydrogels, laxatives.