PVDF: Polyvinylidene fluoride
- Short Name
- PVDF
- Name
- Polyvinylidene fluoride
- Group
- HTRTP - High-Temperature Resistant Thermoplastics
- General Properties
- Chemical Formula
- Structural Formula
-
Properties
- Glass Transition Temperature
- -40 °C
- Melting Temperature
- 170 to 175 °C
- Melting Enthalpy
- 105 J/g
- Decomposition Temperature
- 440 to 480 °C
- Young's Modulus
- 2000 to 2900 MPa
- Coefficient of Linear Thermal Expansion
- 110 to 130 *10¯6/K
- Specific Heat Capacity
- 0.96 to 1.40 J/(g*K)
- Thermal Conductivity
- 0.19 W/(m*K)
- Density
- 1.76 to 1.78 g/cm³
- Morphology
- Semi-crystalline polymer
- General properties
- Rigid and tough. Very good chemical resistance. High UV resistance. Good abrasion resistance. Very low water absorption
- Processing
- Extrusion, injection molding
- Applications
- Chemical industry, construction of chemical plants. Food industry. Semiconductor industry
Internet Links
NETZSCH Measurements
- Instrument
- DSC 204 F1 Phoenix®
- Sample Mass
- 18.64 mg
- Isothermal Phase
- 5 min/3 min/5 min
- Heating/Colling Rates
- 10 K/min
- Crucible
- Al, pierced
- Atmosphere
- N2 (70 ml/min)
Evaluation
PVDF is a semi-crystalline polymer and shows, along with a glass transition at -40°C (midpoint, visible in both heatings), a broad melting range from approx. 50°C/60°C to approx. 200°C. Nevertheless, the molecular weight distribution of the polymer chains is narrow, as indicated by the narrow full width at half maximum of the main peak with a peak temperature of 175°C (2nd heating, green). The melting enthalpy was approx. 66 J/g in the 2nd heating (green) indicating a degree of crystallinity of approx. 63%, based on an enthalpy value of 105 J/g for the 100% crystalline material.