PGA
Polyglycolic Acid
Glass Transition (Tg)
35–40 °C
Melting Point (Tm)
220–225 °C
Density
1.50–1.70 g/cm³
CAS Number
26124-68-5
Recycling Code
♺ 7
Category
Biodegradable
Repeat Unit
–[O–CH₂–CO]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
Highly crystalline with the fastest hydrolytic degradation of the common polyesters (weeks); excellent gas barrier; soluble in very few solvents.
Applications
Absorbable sutures (Dexon), barrier layers, oil-field frac plugs.