author
Bobby Brown
Post 2016-02-19
PVDF Material Characterization

Contents


What is PVDF

PVDF, or Polyvinylidene Fluoride, is a high-performance polymer belonging to the fluoropolymer family. High molecular weight materials consist of long chains of repeating monomer units formed through polymerization reactions. Many natural materials, such as natural rubber and cotton, as well as synthetic chemical fibers, are composed of polymers.
PVDF is created through the polymerization of vinylidene fluoride monomers. It exhibits excellent chemical stability, heat resistance, mechanical properties, and durability. These attributes make PVDF an ideal material for various applications, including:
  • Chemical Industry: Used to manufacture corrosion-resistant pipes and containers.
  • Solar Panels and Lithium Batteries: Acts as a binder or coating material.
  • Semiconductor Processing Equipment: Utilized due to its durability and resistance to harsh chemicals.
  • Medical Devices: Preferred for its stability and biocompatibility.

PVDF Chemical and Physical Properties

PVDF Temperature Resistance and Structure

PVDF plastic has a molecular structure that gives it exceptional chemical stability and resistance to most chemicals and solvents. This makes it an ideal material for pipes and containers used in the chemical industry. PVDF can operate for extended periods in temperatures ranging from -30°C to 150°C, with some special grades capable of withstanding even higher temperatures.

PVDF Mechanical and Thermal Properties

PVDF exhibits outstanding tensile strength and impact resistance, making it suitable for high-durability applications. Its physical properties include:
  • PVDF Density: Typically 1.78-1.79 g/cm³
  • Temperature Range: Generally from -30°C to 150°C. The melting point of PVDF is around 177°C, which is relatively low compared to other fluoropolymers, making it easy to process and mold.
  • Corrosion Resistance: It can withstand all strong acids, bases, oxidizers, reducers, and various organic solvents, except for molten alkali metals, fluorinated media, and molten strong bases.
  • Insulation: PVDF's electrical resistance can reach up to 10^18 ohm·cm, with minimal dielectric loss and high breakdown voltage, unaffected by environmental conditions and frequency.
  • Self-Lubricating: PVDF has the lowest friction coefficient among plastics, making it an ideal material for oil-free lubrication.
  • Non-Stick Surface: No known solid materials can adhere to its surface, making it a solid material with the lowest surface energy.
  • Weather Resistance: PVDF maintains its surface and performance even after prolonged exposure to the atmosphere due to its excellent radiation resistance and low permeability.

Chemical resistance chart

How to use this chart

» Meaning of symbol:
  • OK: Recommended.
  • △: Must confirm if usable by testing in advanced.
  • X: Not recommended.
  • N/A: No relevant data available for reference
» This chart only provides the result of a single chemical to material, if a client uses more than one kind of chemical at the same time, please choose material by experience. » This chart is for reference only which is not applicable to all working environments. Please refer to design equipment according to practical experience.
Category Name PVDF
Organic acids
Acetic acid OK (80% @ 80˚C)
△ (80% @ 100˚C)
X (80% @ 120˚C)
Acetic acid, glacial OK (80˚C)
△ (100˚C)
X (120˚C)
Acetic anhydride △ (25˚C)
X (50˚C)
Citric acid OK
Organic compound
Acetaldehyde N/A
Acetone OK (50% @ 25˚C)
△ (100% @ 25˚C)
X (100% @ 50˚C)
Methyl alcohol N/A
Aniline OK (80˚C)
△ (100˚C)
Benzaldehyde OK (25˚C)
△ (50˚C)
Benzene OK (80˚C)
△ (100˚C)
Benzyl alcohol OK
Benzyl chloride OK (100˚C)
Corn oil OK
Ethanol OK
Ethylene glycol OK
Fatty acid N/A
Formaldehyde OK (37% @ 80˚C)
Formic acid OK (20%)
Hexane OK
Lactic acid OK (50˚C)
△ (80˚C)
X (100˚C)
Methanol OK
Paraffin oil N/A
Petroleum OK
Phenol OK (100% @ 65˚C)
△ (100% @ 80˚C)
Propane, liq OK
Propanol OK (80˚C)
△ (100˚C)
Stearic acid OK
Tannic acid OK (110˚C)
Tartaric acid N/A
Toluene OK (80˚C)
△ (100˚C)
Urea N/A
Inorganic compound
Ammonia N/A
Ammonium chloride OK
Ammonium hydroxide N/A
Ammonium nitrate OK
Ammonium sulfate OK
Aqua regia N/A
Barium chloride OK
Barium hydroxide OK
Brine N/A
Calcium Chloride OK
Calcium hydroxide OK
Carbonic acid OK
Chloric acid N/A
Chlorine OK (100˚C)
Detergent N/A
Hydrobromic acid OK (50% @ 100˚C)
Hydrochloric acid OK (20% @ 100˚C)
△ (35% @ 120˚C)
Hydrofluoric acid N/A
Hydrogen peroxide OK (80˚C)
Nitric acid OK (60% @ 65˚C)
△ (60% @ 80˚C)
X (60% @ 100˚C)
Phosphoric acid OK (85%)
Potassium hydroxide OK (80˚C)
△ (100˚C)
X (110˚C)
Potassium nitrate OK
Potassium sulfate OK
Sodium carbonate OK
Sodium hydroxide OK (10˚C)
X (40˚C)
Sodium nitrate OK△X
Sulfuric acid OK
Sulfur dioxide OK (98% @ 65˚C)
△ (98% @ 80˚C)
X (98% @ 100˚C)
X (fuming)

Reference

  1. ^ PVDF - wikipedia
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