427160

Poly(vinylidene fluoride-co-hexafluoropropylene)

average M_w ~400,000, average M_n ~130,000, pellets

• Synonym(s): PVDF-HFP
• Linear Formula: (-CH₂CF₂-)_x[-CF₂CF(CF₃)-]_y
• CAS Number: 9011-17-0
• MDL number: MFCD00212573
• UNSPSC Code: 12162002
• PubChem Substance ID: 24866741
• NACRES: NA.23

Properties

• form: pellets
• melt index: 3.5-7.5 g/10 min (230°C/12.5kg)
• mol wt: average M_n ~130,000; average M_w ~400,000
• impact strength: 12-20 ft-lb/in. (Izod, ASTM D 256, notched)
• dielectric constant: 9.4-10.6, 100 Hz (ASTM D 150)
• hardness: 65-70 (Shore D, ASTM D 2240)
• refractive index: n20/D 1.41
• viscosity: 23,000-27,000 poise(230 °C) (100 sec^-1; typical)(lit.)
• transition temp: brittleness temperature -62 °C (ASTM 2800); T_m 140-145 °C (ASTM D 3418)
• density: 1.77 g/mL at 25 °C
• SMILES string: FC(F)=C.FC(F)=C(F)C(F)(F)F

Description

General description

Poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) is a hydrophobic crystalline copolymer with excellent properties such as good thermal stability, high polarity, ionic conductivity, and good solvent resistance.

Application

Owing to its high polarity, wettability by organic solvents, and relatively high ionic conductivity, PVDF-HFP is widely used as a polymer matrix to prepare gel polymer electrolytes for energy storage applications. For example, it can be used to enhance the performance of flexible solid-state supercapacitors.

It can be used to prepare superhydrophobic polymer nanocomposites. For example, PVDF-HFP- SiO₂ composite can be used to enhance the thermochromism in regioregular poly(3-hexylthiophene), P3HT.

It can also be used to prepare lead-free piezoelectric flexible polymer composites for nanogenerators. PVDF-HFP can be preferred over other polymer matrices because of its higher solubility, greater free volume, and better mechanical strength.

Wire and cable coatings, flexible and corrosion-resistant tubing, and liners for pipes and tanks.

Features and Benefits

Excellent thermal stability, chemical and abrasion resistance, impervious to UV degradation, self-extinguishing and retains properties on aging. Improved flexibility at subzero temperatures, stress crack resistance and elongation to break over poly(vinylidene fluoride).

Physical form

Crystalline, thermoplastic copolymer.

Safety Information

• Storage Class Code: 11 - Combustible Solids
• WGK: WGK 2
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable
• Personal Protective Equipment: dust mask type N95 (US), Eyeshields, Gloves