PIB: Polyisobutylene
- Short Name
- PIB
- Name
- Polyisobutylene
- Group
- CTP - Commodity Thermoplastics
- General Properties
- Chemical Formula
- Structural Formula
-
Properties
- Glass Transition Temperature
- -70 to -60 °C
- Melting Temperature
- - °C
- Melting Enthalpy
- - J/g
- Decomposition Temperature
- 390 to 400 °C
- Young's Modulus
- - MPa
- Coefficient of Linear Thermal Expansion
- 120 *10¯6/K
- Specific Heat Capacity
- 1.97 J/(g*K)
- Thermal Conductivity
- 0.12 to 0.20 W/(m*K)
- Density
- 0.91 to 0.93 g/cm³
- Morphology
- Amorphous thermoplastic
- General properties
- High elongation at break, good electrical insulating properties, resistant to acids, bases and salts.
- Processing
- Extrusion, calendering.
- Applications
- Building industry, sealing compounds, component of coatings, adhesive, basic material for chewing gum, plastification of explosives.
Internet Links
NETZSCH Measurements
- Instrument
- DSC 204 F1 Phoenix®
- Sample Mass
- 15.17 mg
- Isothermal Phase
- 20 min/2 min/20 min
- Heating/Colling Rates
- 10 K/min
- Crucible
- Al, pierced
- Atmosphere
- N2 (40 ml/min)
Evaluation
PIB is an amorphous thermoplastic, as reflected in the DSC curves. In both heatings, a glass transition at -64°C (midpoint) was observed exclusively. The step heights (Δcp) are identical in both curves and have a value of 0.39 J/(g·K) in both the 1st heating (blue) and 2nd heating (green).