1,1-difluoroethene
poly(vinylidene fluoride)
CAS: 24937-79-9
Molecular Formula: C2H2F2
1,1-difluoroethene - Names and Identifiers
1,1-difluoroethene - Physico-chemical Properties
| Molecular Formula | C2H2F2 |
| Molar Mass | 64.0340864 |
| Density | 1.78g/mLat 25°C |
| Melting Point | 166-170°C |
| Water Solubility | Soluble in organic esters, dimethylacetamide and amines. Insoluble in water. |
| Solubility | some polar solvents such as organic esters and amines: soluble |
| Vapor Presure | 15 mm Hg ( 32 °C) |
| Appearance | White powder |
| Color | White |
| Storage Condition | Sealed in dry,Room Temperature |
| Stability | Stable. Incompatible with strong oxidizing agents, silica. |
| Refractive Index | n20/D 1.42 |
| MDL | MFCD00084470 |
| Use | Used for pressing chemical machinery parts, sealing materials, electrical insulation and anti-corrosion coating, preparation of ion exchange membrane, capacitor film and other materials |
1,1-difluoroethene - Risk and Safety
| Safety Description | S22 - Do not breathe dust. S24/25 - Avoid contact with skin and eyes. |
| WGK Germany | 3 |
| TSCA | Yes |
1,1-difluoroethene - Upstream Downstream Industry
| Raw Materials | Pentadecafluorooctanoic acid |
1,1-difluoroethene - Reference
| Reference Show more | 1. Su Bingfeng, Wang Xiu, Ma Guohua. Effect of chronin on cardiac function and expression of MMP-2/MAPK in rats with acute myocardial infarction [J]. Chinese pharmacist, 2020,23(11):2128-2132. 2. Lianglei Liu, Shaohui Xiong, Liangbin Zeng, Changyong Cai, Fenfang Li, Zhijian Tan, Two birds with one stone: Porous poly(ionic liquids) membrane with high efficiency for the separation of amino acids mixture and its antibacterial properties, Journal of Co |
1,1-difluoroethene - Nature
Open Data Verified Data
white powdery crystalline polymer, relative density 1. 75~1.78, glass transition temperature -39 ℃, embrittlement temperature -62 ℃, crystallization melting point 180 ℃, thermal decomposition temperature 350 ℃, long-term use temperature -40~150 ℃. The processing temperature range from the melting point to the decomposition temperature is wide, the processing temperature is low, the melt viscosity is small, and the processing is easy, and the general thermoplastic plastic molding method can be used. Mechanical strength is one of the most superior fluorine resin, and in a certain temperature and pressure can still maintain good strength. The tensile strength is up to 53. 9MPa at room temperature and 34. 3MPa at 100 ℃. At the same time, it has good impact strength, good toughness, high hardness and good wear resistance. The creep resistance is also one of the best in fluororesin. Under the load of 9. 8MPa, the creep elongation at room temperature is only 100, and the creep elongation at ℃ is 7%. With outstanding anti-ultraviolet and anti-weathering properties, the film will not become brittle and crack when placed outdoors for 20 years. The radiation resistance is also prominent, and the performance of the film is not seriously decreased after 3 × 106 Gy ray irradiation. Excellent electrical properties, dielectric constant (60 ~ lO5 H2) up to 6.o ~ 8.o, dielectric loss tangent is larger, about 0. Between 04~0.2, the volume resistivity is slightly lower, about 3 * l012 Q.cm. It also has piezoelectric and thermoelectric properties. Chemical stability is good, at room temperature is not acid, alkali, strong oxidant and Halogen corrosion, aliphatic hydrocarbons, aromatic hydrocarbons, alcohols, aldehydes and other organic solvents have no effect on it, only fuming sulfuric acid, strong alkali, ketone, ether and a small number of chemicals can make its swelling or partial dissolution, dimethyl acetamide and dimethyl sulfoxide and other strong polar organic solvents can dissolve into colloidal solution. In addition, its water absorption at 80 °c is only 0. 03%, and its permeability to chlorine gas is also the smallest in fluororesin.
Last Update：2024-01-02 23:10:35
1,1-difluoroethene - Preparation Method
Open Data Verified Data
in the polymerization reactor, water as medium, with potassium persulfate as initiator, and add buffer, and then add vinylidene fluoride, at 50~95 ℃ and 1.96~3. Polymerization is carried out under the condition of 92MPa, that is, a powdery polymer is obtained, and then washed and dried to obtain a finished product.
Last Update：2022-01-01 11:09:03
1,1-difluoroethene - Use
Open Data Verified Data
- electrical and electronic industrial wire, cable coating, sleeve, Heat Shrinkable tube, bobbin, wiring board, printed circuit board, wire harness device, anode shield, high dielectric constant capacitor film and electric heating band, optical fiber sheath or outer coating, etc. Because the dielectric loss of polyvinylidene fluoride is larger, especially suitable for low voltage electrical insulation. Good processing strength, flexibility, easy processing, good transparency, easy coloring, so it is an excellent insulation material for low voltage electrical products. After unidirectional stretching and polarization treatment of polyvinylidene fluoride, CF3 bipolar ions form J9 crystals in the same direction, resulting in great piezoelectricity. It can change the vibration energy into electrical energy, and can also change the electrical energy into vibration energy. In addition, good processing, can be processed into a variety of free shapes, its application scope is expanding, has been applied to the piezoelectric film audio components, such as 10~20kHz speakers, microphones, headphones, telephones, etc; such as> 20kHz, up to 900MHz probe, microphone, ultrasonic microscope and ultrasonic air, etc.; Measurement of vibration meter, pressure gauge, accelerometer, etc.; Medical sphygmomanometer and palpation device; thermoelectric film has been used in radiation thermometer, infrared sensor, millimeter wave detector, radiation energy detector, laser energy detector; Fire detector and anti-theft detector.
- metal materials and anti-corrosion coatings for construction, if used as metal and wood surface coating, can make it with cutting resistance, wear resistance, corrosion resistance and weather resistance.
- the composite material made of polyvinylidene fluoride and ABS resin not only retains their respective characteristics, but also has good weather resistance and processability, and can be widely used in construction, vehicle interior and exterior decoration, home appliance shell, advertising signs, road signs, Sports Goods, indoor and outdoor water supply tank cover, shop decoration, roof and garden decoration, etc.
- polyvinylidene fluoride silk is most suitable for use as a fishing line. Because of its good mechanical toughness, especially the strength of the nodules in the water is good, the fine line can be used to catch the big fish; Its refractive index is similar to the water, the relative density is large, easy to sink, easy to use. In addition, it is also possible to process a porous material, which can be used to produce a pen core and the like.
Last Update：2022-01-01 11:08:58
1,1-difluoroethene - Safety
Open Data Verified Data
iron drum packs, 15kg per pack, were stable for storage at room temperature for 6 months. F26 pellet 25kg per barrel, color transparent, white, black, red, blue, yellow, gray, green, brown, orange, purple and so on. Storage warehouse and transport process should be kept clean and dry, to prevent impurities mixed; Should avoid severe vibration and sun, rain, to prevent packaging damage. In order to ensure the cleanliness of the pellets and the quality of the products, direct contact with the product by hand is prohibited.
Last Update：2022-01-01 11:08:59
1,1-difluoroethene - Reference Information
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| use | used for pressing chemical machinery parts, sealing materials, electrical insulation and anti-corrosion coatings, preparing ion exchange membranes, capacitor films and other materials |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-09 21:21:28
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Multiple Specifications
Product Name: Polyvinylidene fluoride Request for quotationCAS: 24937-79-9
Tel: +86 19849939632
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Mobile: +86 19849939632
QQ: 2470479589
Wechat: +86 19849939632
Product Name: poly(vinylidene fluoride) Request for quotation
CAS: 24937-79-9
Tel: 0086-551-65418684
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Raw Materials for 1,1-difluoroethene