PVC
Polyvinyl Chloride
Glass Transition (Tg)
80–85 °C
Melting Point (Tm)
— (amorphous)
Density
1.38–1.45 g/cm³
CAS Number
9002-86-2
Recycling Code
♺ 3
Category
Commodity
Repeat Unit
–[CH₂–CHCl]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
Inherently flame retardant due to chlorine; requires heat stabilisers; rigid (U-PVC) or flexible (P-PVC) depending on plasticiser loading.
Applications
Pipes and fittings, window profiles, cable insulation, flooring, medical tubing.