CAS 9002-84-0 Poly(tetrafluoroethylene) - Materials / Alfa Chemistry

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Biomaterials

Hydrophobic Polymers

Poly(tetrafluoroethylene)

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Catalog Number

ACM9002840-50

Product Name

Poly(tetrafluoroethylene)

Structure

CAS

9002-84-0

Category

Hydrophobic Polymers

Synonyms

Fluoropolymer, Fluorinated polymer, PTFE

Description

PTFE is generally referred to as "non-stick coating"/"easy-cleaning material"; it is a synthetic polymer material that uses fluorine to replace all hydrogen atoms in polyethylene. This material has the characteristics of acid and alkali resistance, resistance to various organic solvents, and is almost insoluble in all solvents.

IUPAC Name

1,1,2,2-tetrafluoroethene

Molecular Weight

100.01g/mol

Molecular Formula

C2F4

Canonical SMILES

F\C(F)=C(\F)F

InChI

InChI=1S/C2F4/c3-1(4)2(5)6

InChI Key

BFKJFAAPBSQJPD-UHFFFAOYSA-N

Boiling Point

-105.3 °F at 760 mm Hg (NTP, 1992);-75.9 °C;-19.9 °C;-75.9 °C;-75.9 °C;-105.3°F

Melting Point

327°C

Flash Point

> 93.3°C (> 200°F)

Density

Solubility

Insoluble (NTP, 1992);0.00 M;No substance has been found which will dissolve the polymer at moderate temperatures;In water, 1.59X10+2 mg/L at 25 °C;Solubility in water, mg/l at 25 °C: 159 (very slightly soluble)

Appearance

Colourless gas

Application

PTFE is widely used in various occasions where resistance to acid, alkali and organic solvents is required, and is used to make non-stick pans and dry-type transformers. Teflon has a soft texture, so it is often used for coatings. When it was first developed, its main application area was the inner wall coating of high-temperature launch rockets. PTFE is also the main component of the green tape.

Color/Form

White translucent to opaque solid;Soft, waxy, milk-white solid;White solid;Colorless gas

Complexity

55.6

Covalently-Bonded Unit Count

EC Number

204-126-9;618-337-2

Exact Mass

99.993613g/mol

Features And Benefits

Corrosion resistance: It can withstand the action of all strong acids, strong bases, strong oxidants, reducing agents and various organic solvents except molten alkali metals, fluorinated media and molten strong bases.
Insulation: not affected by the environment and frequency, the resistivity can reach 1018 ohm·cm, the dielectric loss is small, and the breakdown voltage is high.
High and low temperature resistance: little change in temperature, wide temperature range, usable temperature -190~260 ℃.
Self-lubricating: It has the smallest friction coefficient among plastics and is an ideal oil-free lubricating material.
Surface non-stick: None of the known solid materials can adhere to the surface, and it is a solid material with the smallest surface energy.
Atmospheric aging resistance, radiation resistance and low permeability: long-term exposure to the atmosphere, the surface and properties remain unchanged.
Incombustibility: The oxygen limit index is below 90.

Form

beads

Formal Charge

Heavy Atom Count

ICSC Number

1779

Log P

log Kow = 1.21 (est);1.21 (estimated)

MDL Number

MFCD00084455

MeSH Entry Terms

tetrafluoroethene;tetrafluoroethylene;tetrafluoroethylene, ion(1+);tetrafluoroethylene, ion(1-)

Monoisotopic Mass

99.993613g/mol

Odor

Odorless

Other Experimental

Not wetted by water; subject to cold flow at high pressure;Useful temp range cryogenic to +260 °C; Reverts to gaseous monomer at temperatures above 400 °C; Shore hardness 55-56; Tensile strength 3500-4500 psi; Flexural modulus about 80,000-90,000 psi at room temperature; Brittle point below -80 °C; Dielectric constant: 2.0-2.05 at 60 to 3X10+9 cycles;Waxy, slippery feel;A highly stable theromplastic tetrafluoroethylene homopolymer. Composed of at least 20,000 CF2 monomer units linked into very long unbranched chains. Not affected by water, aqua regia, chlorosulfonic acid, acetyl chloride, boron fluoride, hot nitric acid, boiling solutions of sodium hydroxide and organic solvents.;Low coefficient of friction; upon heating, weight loss varies from 0.001%/hr at 290 °C to 4%/hr at 450 °C;Only alkali metals and fluorine under pressure attack Teflon below 300 °C;Spun in molten state; density of threads about 2.3; breaking stress can reach 40 kg/sq mm with approx 30% elongation;Does not carbonize in air at 700 °C; at 400 °C = 0.0002% weight loss/hr, at 500 °C = 0.0002% weight loss/hr; at 600 °C = 0.0002% weight loss/hr; at 680 °C = 0.001% weight loss/hr; at 734 °C = 0.006% weight loss/hr; at 788 °C = 0.09% weight loss/hr;Melts to an extremely viscous gel at 327 °C and reverts to the gaseous monomer at temperatures above 400 °C;ODORLESS OR FAINT ODOR; CRITICAL TEMP: 92 °F= 33 °C= 306 DEG K; HEAT OF POLYMERIZATION: -450 BTU/LB= 250 CAL/G= -10.5X10+5 JOULES/KG; CRITICAL PRESSURE: 573 PSIA= 38.9 ATM= 3.95 MN/SQ M; HEAT OF COMBUSTION: -4,000 BTU/LB= -2,000 CAL/G= -90X10+5 JOULES/KG /INHIBITED/;Much heavier than air;Critical density = 0.58 g/cu cm; Heat of evaporation = 16,821 J/mol at -75.6 °C;Henry's Law constant = 0.629 atm-cu m/mol at 25 °C (est);Hydroxyl radical reaction rate constant = 1.13X10-11 cu cm/molec-sec at 298 K;Ozone reaction rate constant = 4.80X10-21 cu cm/molec-sec at 298 K;Nitrate radical reaction rate constant = <3X10-15 cu cm/molec-sec at 298 K

Packaging

1 kg

Particles Size

≥350 μm

Refractive Index

1.35

Rotatable Bond Count

Stability

Stable - unreactive with most materials. Incompatible with molten alkali metals, fluorine and other halogens, strong oxidizing agents.

Storage Conditions

Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.

Storage Temperature