CAS 9002-84-0 Polytetrafluoroethylene preparation

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Polytetrafluoroethylene preparation

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Catalog Number

ACM9002840-56

CAS Number

9002-84-0

Product Name

Polytetrafluoroethylene preparation

Structure

Category

Hydrophobic Polymers; Polymers

Synonyms

PTFE dispersion

Description

PTFE is a synthetic fluropolymer of tetrafluoroethylene. It is a fluorocarbon solid, as it is a high molecular weight compound consisting wholly of carbon and fluorine. PTFE is hydrophobic in nature, it also has the lowest coefficient of friction against any solid.

IUPAC Name

1,1,2,2-tetrafluoroethene

Molecular Weight

100.01g/mol

Molecular Formula

(CF2CF2)n

Canonical SMILES

C(=C(F)F)(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

-224.5 °F (NTP, 1992);-142.5 °C;-89.0 °C;Melts to an extremely viscous gel at 327 °C;-131.15 °C;-131.2 °C;-224.5°F

Flash Point

<32 °F (<0 °C) (closed cup) /Tetrafluoroethylene, inhibited/

Density

1.519 at -105 °F (NTP, 1992);2.2 g/cu cm;1.519 g/cu cm at -76 °C;Density (at -76 °C): 1.5 g/cm³;1.519 at -105°F

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)

Application

Our hydrophobic polymers are used as coatings, adhesives, fibers, films and engineering plastics. Furthermore, they are widely used as biomedical polymers for vascular grafts, implants and ophthalmic applications.

Color/Form

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

Complexity

55.6

Composition

60 wt % dispersion in H2O

Covalently-Bonded Unit Count

EC Number

204-126-9;618-337-2

Exact Mass

99.993613g/mol

Features And Benefits

This product has good hydrophobicity to meet your specific application needs

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

100, 500 mL in glass bottle

Rotatable Bond Count

Stability

Stable under recommended storage conditions.;The finished polymerized compound is inert under ordinary conditions.

Storage Temperature

2-8°C

UNII

OMW63Z518S

UN Number

1081;1081;1081;1081

Vapor Density