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Poly(tetrafluoroethylene)

Description Preparation References
Product Name
Poly(tetrafluoroethylene)
CAS No.
9002-84-0
Chemical Name
Poly(tetrafluoroethylene)
Synonyms
PTFE;POLYTETRAFLUOROETHYLENE;TEFLON;PTFE poly(tetrafluoroethylene);Polyflon;PTFE POWDER;Fluoropolymer;Politef;Fluoroflex;Fluorolene
CBNumber
CB4392561
Molecular Formula
(C2F4)x
Formula Weight
100.02
MOL File
9002-84-0.mol
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Poly(tetrafluoroethylene) Property

Melting point:
327 °C
Boiling point:
400 °C
Density 
2.15 g/mL at 25 °C
refractive index 
1.35
storage temp. 
Store at -20°C
solubility 
Solubility in water:
form 
powder
color 
white
Specific Gravity
2
Odor
at 100.00?%. odorless
Water Solubility 
Insoluble in water. Soluble in perfluoro kerosene.
Merck 
14,7562
Dielectric constant
2.0(Ambient)
Stability:
Stable - unreactive with most materials. Incompatible with molten alkali metals, fluorine and other halogens, strong oxidizing agents.
IARC
3 (Vol. 19, Sup 7) 1987
NIST Chemistry Reference
Polytetrafluoroethylene, annealed(9002-84-0)
EPA Substance Registry System
Polytetrafluoroethylene (9002-84-0)
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Safety

Hazard Codes 
Xi,T,Xn
Risk Statements 
41-36/38-45-48/20
Safety Statements 
26-39-24/25-45-22-53-23
WGK Germany 
3
RTECS 
KX4025000
Hazard Note 
Irritant
TSCA 
Yes
HS Code 
39046100
Hazardous Substances Data
9002-84-0(Hazardous Substances Data)
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Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal word
Danger
Hazard statements

H318Causes serious eye damage

Precautionary statements

P280Wear protective gloves/protective clothing/eye protection/face protection.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

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N-Bromosuccinimide Price

Sigma-Aldrich
Product number
GF90867796
Product name
Polytetrafluoroethylene
Purity
(PTFE), tube, outside diameter 6.42mm, L 500?mm, wall thickness 0.51?mm
Packaging
1EA
Price
$198
Updated
2024/03/01
Sigma-Aldrich
Product number
GF98414916
Product name
Polytetrafluoroethylene
Purity
(PTFE), film, thickness 0.175?mm, size 200 × 310?mm, pore size 5.0ám
Packaging
1EA
Price
$747
Updated
2024/03/01
Sigma-Aldrich
Product number
GF90867796
Product name
Polytetrafluoroethylene
Purity
(PTFE), tube, outside diameter 6.42mm, L 500?mm, wall thickness 0.51?mm
Packaging
5EA
Price
$804
Updated
2024/03/01
Sigma-Aldrich
Product number
GF90867796
Product name
Polytetrafluoroethylene
Purity
(PTFE), tube, outside diameter 6.42mm, L 500?mm, wall thickness 0.51?mm
Packaging
10EA
Price
$1470
Updated
2024/03/01
Sigma-Aldrich
Product number
GF90430859
Product name
Polytetrafluoroethylene
Purity
(PTFE), film, thickness 0.15?mm, size 150 × 150?mm
Packaging
1EA
Price
$197
Updated
2024/03/01
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Poly(tetrafluoroethylene) Chemical Properties,Usage,Production

Description

Poly-(Tetrafluoroethylene) (PTFE, Brand name: Teflon, Fluon, Hostaflon, and Polyflon) is a kind of strong, tough, waxy and nonflammable synthetic resin. Its structure formula is [CF2-CF2]n with a carbon backbone chain. It is produced through the free-radical polymerization of tetrafluoroethylene. PTFE has slippery surface, high melting point, and is extremely chemically inert. This property make it have a lot of applications. Its biggest application is for the wiring in aerospace and computer applications due to its excellent dielectric properties, e.g. as the insulator in cables and connector. In industry, PTFE can be applied in places where sliding action of parts is required due to its low friction such as plain bearings, gears and slide plates. PTFE is also applied in the production of carbon fiber composites and fiberglass composites. In addition, owing to its chemical inertia and high thermal resistance, PTFE is applied in places where acids, alkalis or other chemical are used, e.g. as the liner in industrial pipe lines.

Preparation

Poly(tetrafluoroethylene) is prepared from tetrafluoroethylene and consists of repeating units in a predominantly linear chain:
F2C=CF2 --->[-CF2-CF2-]n
Tetrafluoroethylene polymer has the lowest coefficient of friction of any solid. It has remarkable chemical resistance and a very low brittleness temperature (100C). Its dielectric constant and loss factor are low and stable across a broad temperature and frequency range. Its impact strength is high.

References

http://pslc.ws/macrog/ptfe.htm
https://global.britannica.com/science/polytetrafluoroethylene
https://en.wikipedia.org/wiki/Polytetrafluoroethylene#Other

Description

Tetrafl uoroethylene (TFE), also known as perfl uoroethylene, is a colorless, fl ammable, toxic gas. It is the monomer used for polytetrafl uoroethylene (PTFE), which is sold under the DuPont tradename of Tefl on. TFE is co-polymerized with other compounds to produce a variety of Tefl ons. TFE is produced by heating chlorodifl uoromethane (CHClF2, Freon-22) or trifl uoromethane (CHF3, Freon-23). TFE is used almost exclusively as a monomer in the production of PTFE. PTFE is a vinyl polymer, which means it is made from a monomer with carbon-carbon double bonds. PTFE is made from TFE by free radical polymerization.
PTFE’s unique physical properties are due to its chemical structure. PTFE consists of long chains of carbon atoms surrounded by fluorine atoms. The fluorine atoms act as a protective barrier that shields the carbon-carbon bond from chemical attack. The fluorine atoms repel other atoms, making it diffi cult for anything to stick to PTFE. PTFE resins have very low coeffi cients of friction (< 0.1). The strong fluorine-to-carbon bonds and high electronegativity of fluorine make PTFE very stable. The long chains of PTFE pack closely together to give a dense crystalline solid. The packing, which can be compared to stacking boards, produces little cross-linking.

Chemical Properties

white powder, or white solid with a slippery feel

Chemical Properties

Polytetrafluoroethylene is a white solid with a waxy appearance and feel. It is a tough flexible material of moderate tensile strength with a tendency to creep under compression.The electrical insulation properties are outstanding and are nearly as good as those of polyethylene. The coefficient of friction is unusually low and stated to be lower than that of any other solid; the non-stick properties are also excellent.
Polytetrafluoroethylene has exceptional resistance to chemical attack and is inert towards all types of reagents except molten alkali metals and fluorine. No solvent is known for the polymer, but it is swollen by some fluorocarbon oils at temperatures approaching the crystalline melting point; other organic materials do not even swell the polymer.
Polytetrafluoroethylene has high thermal stability and retains its properties over a wide temperature range. The polymer may be used up to about 300°C for long periods without loss of strength and thin sections remain flexible at temperatures below -100°C. There is some weight loss when polytetrafluoroethylene is heated above about 200°C but this very small up to about 350°C. The polymer also has good weather resistance.

History

The polymerized form of TFE was discovered accidentally by researchers at DuPont in 1938. During the mid-1930s, DuPont was investigating the development of new chlorofl uorocarbons (CFCs) for use as refrigerants. DuPont joined with General Motors to form a company called Kinetic Chemicals to combine their efforts in this area. Plunkett examined the properties of the substance. He discovered that the substance was inert to other chemicals, had a high melting point, and was very slippery. Plunkett also worked on duplicating the conditions necessary to produce it from TFE. He applied for a patent for polytetrafl uoroethylene polymers in 1939, which was granted in 1941 (U.S. Patent 2230654). He assigned the patent to Kinetic Chemicals. DuPont registered the term Tefl on in 1945 and introduced Tefl on products the next year.
Teflon is best known for its use in cookware, but its use in this area followed original industrial applications in gaskets, sealers, tape, and electrical insulation. Th ese applications were a direct result of the use of PTFE for military purposes during World War II.

Uses

Inert lubricant.

Uses

polytetrafluoroethylene powder be used for plastic modification, average particle size is about 3-5 and 10-20 micrometer, PTFE has excellent performance, it has unique properties, including, no self-coagulation, no electrostatic effect, good intermiscibility, low molecular weight, good dispersion, high self-lubrication, low friction coefficient, etc.

Uses

Poly(tetrafluoroethylene) is used in hundreds of applications in addition to cookware. Poly(tetrafluoroethylene) is used in inks, plastics, coatings, and lubricants.Poly(tetrafluoroethylene) can be molded into gaskets, seals, bearings, gears, and other machine parts. Poly(tetrafluoroethylene) is used as liners, insulation, membranes, and adhesives. Tefl on tape is commonly used in plumbing work. Poly(tetrafluoroethylene) is used to produce rainproof garments.

Uses

For hookup and hookup-type wire in electronic equipment; in computer wire, electrical tape, electrical components, spaghetti tubing. Seals and piston rings, basic shapes, bearings, mechanical tapes, coated glass fabrics. As tubing and sheets for chemical laboratory and process work; for lining reaction vessels; for gaskets and pump packings, sometimes mixed with graphite or glass fibers; as electrical insulator especially in high frequency applications; filtration fabrics; protective clothing. Prosthetic aid.

Uses

PTFE (polytetrafluoroethylene) is a bulking agent, it is also used in cosmetic preparations to improve the formulation’s feel and spreadability. PTFe may also have some waterproofing potential.

Definition

A synthetic polymer made from tetrafluoroethene (i.e. CF2:CF2). It is able to withstand high temperatures without decomposing and also has a very low coefficient of friction, hence its use in non-stick pans, bearings, etc.

Preparation

The preferred commercial method of preparation of polytetrafluoroethylene (PTFE) is by suspension polymerization. The details of the procedures employed have not been disclosed but it appears that two main processes are in use. In the first process, the conventional techniques of suspension polymerization are used to produce a granular product suitable for moulding and extrusion. The tetrafluoroethylene is polymerized under pressure in stainless steel autoclaves with a free radical initiator such as ammonium persulphate. The reaction is rapid and exothermic and requires careful control. The polymer granules are collected, washed and dried. In the second process, conditions are adjusted to give a dispersion of polymer of much finer particle size and lower molecular weight. The product may be stabilized and employed in latex form in such uses as film casting, coating and impregnation of fibres. Alternatively, the product may be coagulated to give a powder (often called 'dispersion polymer') used mainly for the extrusion of thin flexible sections.

Definition

ChEBI: A polymer composed of repeating tetrafluoroethyl groups.

Production Methods

Polytetrafluoroethylene is generally made from tetrafluoroethylene gas by free-radical polymerization under pressure with oxygen, peroxides, or peroxydisulfates. The “granular resins” have medium-size particles that range from 30 to 600 mm. Colloidal aqueous dispersions, made by a different process, are concentrated to about 60% by weight of the polymer and have particles that average about 0.2 mm. Coagulated dispersions with agglomerates that average 450mm are also available .
The use of PTFE as a release agent in coatings and certain other food contact applications is permitted under FDA regulations .

General Description

Poly(tetrafluoroethylene) is a fluoropolymer that is commercially known as PTFE. Its properties include high thermal stability, excellent chemical resistance, low dielectric constant and low surface energy. It is a hydrophobic polymer that is majorly used as a protective coating on the metal surface.

Hazard

Evolves toxic fumes on heating. Question- able carcinogen.

Health Hazard

Fumes of heated polytetrafluoroethylene (PTFE) cause polymer fume fever, an influenza-like syndrome.

Industrial uses

The polymer is insoluble, resistant to heat (upto 275°C) and chemical attack, and, in addition,has the lowest coefficient of friction of any solid.Because of its resistance to heat, the fabricationof polytetrafluoroethylene requires modificationof conventional methods. After molding thepowdered polymer using a cold press, the moldingsare sintered at 360 to 400°C by proceduressimilar to those used in powder metallurgy. Thesintered product can be machined or punched.Extrusion is possible if the powder is compoundedwith a lubricating material. Aqueoussuspensions of the polymer can also be used forcoating various articles. However, special surfacetreatments are required to ensure adhesionbecause polytetrafluoroethylene does not adherewell to anything.
Polytetrafluoroethylene (TFE resin) is usefulfor applications under extreme conditions ofheat and chemical activity. Polytetrafluoroethylenebearings, valve seats, packings, gaskets,coatings, and tubing can withstand relativelysevere conditions. Fillers such as carbon, inorganicfibers, and metal powders may be incorporatedto modify the mechanical and thermalproperties.
Because of its excellent electrical properties,polytetrafluoroethylene is useful when adielectric material is required for service at ahigh temperature. The nonadhesive quality isoften turned to advantage in the use of polytetrafluoroethyleneto coat articles such as rollsand cookware to which materials might otherwiseadhere.

Safety Profile

The finished polymerized compound is inert under ordinary condtions. There have been reports of “polymer fume fever” in humansexposed to pyrolysis products, whch also are irritants. Smohng should be prohibited in areas where ths material is being fabricated or, in general, where there may be dust from it. Exposure to pyrolysis or decomposition products appears to be the chief health-related problem. Questionable carcinogen with experimental tumorigenic data by implant. Incompatible with fluorine, sodmm potassium alloy. Under the proper conditions it undergoes hazardous reactions with boron, magnesium, or titanium. When heated to above 750°F it decomposes to yield highly toxic fumes of F-.

Carcinogenicity

Animal studies have not demonstrated that this polymer is carcinogenic. No data are available in humans. The polymer is not classifiable as to its human carcinogenicity. However, the EPA found that perfluorooctanoic acid (PFOA), a chemical used to produce PTEE is a “likely carcinogen.

Environmental Fate

PTFE is the most stable of all TFE polymers and under physiological conditions does not release any components (IARC Monograph 74, 1999). PTFE is very inert chemically; only alkali metals and fluorine under pressure attack PTFE (Hazardous Substances Data Bank (HSDB)). There are no known ecotoxicological effects for PTFE (DuPont MSDS, 2011).

Toxicity evaluation

There is no apparent mechanism of toxicity for orally administered PTFE as no toxicologically significant effects were observed following oral administration to rats for up to 90 days. The lack of toxicity is most likely due to the following: (1) gastrointestinal absorption of PTFE is negligible given its extremely high molecular weight (1 000 000–10 000 000 for PTFE fine powder); (2) PTFE is chemically inert under physiologic conditions; and (3) PTFE is not metabolized (Donovan et al., 1990; Kim, 1996; Veber et al., 2002). The mechanism of action of subcutaneously injected PTFE in mice is attributed to localized inflammation consistent with a foreignbody response; similar effects were seen following subareolar injection in rabbits and dogs, and periurethral injections in dogs.
When PTFE is heated or exposed to temperatures ≥200°C, it will decompose and release toxic vapors that cause polymerfume fever in humans.

Poly(tetrafluoroethylene) Preparation Products And Raw materials

Raw materials

Preparation Products

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Poly(tetrafluoroethylene) Suppliers

Shanghai Aladdin Bio-Chem Technology Co.,LTD
Tel
400-400-6206333 18521732826
Fax
021-50323701
Email
market@aladdin-e.com
Country
China
ProdList
25003
Advantage
65
shanghai hanluo new materials co., ltd
Tel
18321204350 18321204350
Email
behlenjiang@shhlnm.com
Country
China
ProdList
9
Advantage
58
Birdge Chemical (shanghai) Co.,Ltd.
Tel
13248325872
Email
sales@bridgechemical.net
Country
China
ProdList
71
Advantage
58
J & K SCIENTIFIC LTD.
Tel
010-82848833 400-666-7788
Fax
86-10-82849933
Email
jkinfo@jkchemical.com
Country
China
ProdList
96815
Advantage
76
Meryer (Shanghai) Chemical Technology Co., Ltd.
Tel
021-61259108 18621169109
Fax
86-21-61259102
Email
market03@meryer.com
Country
China
ProdList
40228
Advantage
62
Alfa Aesar
Tel
400-6106006
Fax
021-67582001/03/05
Email
saleschina@alfa-asia.com
Country
China
ProdList
30123
Advantage
84
Beijing HwrkChemical Technology Co., Ltd
Tel
010-89508211 18501085097
Fax
010-89508210
Email
sales.bj@hwrkchemical.com
Country
China
ProdList
8418
Advantage
55
Energy Chemical
Tel
021-021-58432009 400-005-6266
Fax
021-58436166
Email
sales8178@energy-chemical.com
Country
China
ProdList
44688
Advantage
61
Shanghai Sinch Parmaceuticals Tech. Co. Ltd.
Tel
+86-21-54098501
Fax
+86-21-54096319
Email
sales@sinch.com.cn
Country
China
ProdList
11598
Advantage
64
Chembridge International Corp.(Taipei/Dongguan/Nanjing)
Tel
025-84712192
Fax
025-84712052
Email
china@chembridge.net
Country
China
ProdList
192
Advantage
62
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View Lastest Price from Poly(tetrafluoroethylene) manufacturers

Hebei Zhuanglai Chemical Trading Co.,Ltd
Product
Poly(tetrafluoroethylene) 9002-84-0
Price
US $99.00-35.00/kg
Min. Order
1kg
Purity
99%
Supply Ability
20ton
Release date
2024-05-17
airuikechemical co., ltd.
Product
Poly(tetrafluoroethylene) / PTFE 9002-84-0
Price
US $0.00-0.00/g
Min. Order
1g
Purity
99.99%
Supply Ability
20 tons
Release date
2024-04-10
Hebei Weibang Biotechnology Co., Ltd
Product
Poly(tetrafluoroethylene) 9002-84-0
Price
US $9.90/KG
Min. Order
1KG
Purity
99%
Supply Ability
5tons
Release date
2024-12-03

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