Polychlorotrifluoroethylene

Structural formula
General
Surname	Poly (chlorotrifluoroethylene)
other names	KEL- F® ; NEOFLON ® ; PCTFE; Polychlorotrifluoroethene;
CAS number	9002-83-9
Monomer	1-chloro-1,2,2-trifluoroethene
Molecular formula of the repeating unit	C 2 ClF 3
Molar mass of the repeating unit	116.47 g mol −1
Type of polymer	Thermoplastic
properties
Physical state	firmly
density	2.13 g cm −3
Melting point	212 ° C
Compressive strength	38 N mm −2
hardness	Shore D90
modulus of elasticity	1429 N mm −2
Water absorption	<0.01%
Elongation at break	150%
Thermal conductivity	4.99 · 10 −4 cal · cm −1 s −1 ° C −1
Thermal expansion coefficient	3.9 · 10 −5 K −1
safety instructions
GHS labeling of hazardous substances	no classification available
	no classification available
H and P phrases	H: see above
	P: see above
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Polychlorotrifluoroethylene ( abbreviation PCTFE ) is a fully halogenated polymer , the the class of polyhalogenated olefins counts. PCTFE is a homopolymer made up of the monomer chlorotrifluoroethylene . The (-CClF-CF ₂ -) _n unit is characteristic of PCTFE . PCTFE is a thermoplastic .

history

PCTFE was founded in 1934 by Dr. Fritz Schloffer (1901–1978) and Dr. Ing. Otto Scherer (1903–1987) discovered at IG Farben . It is the longest known fluoroplastic.

Properties and uses

Like other fluoroplastics, PCTFE is very resistant to many chemicals . In addition, PCTFE has the highest hardness , strength and rigidity among the fluoroplastics. PCTFE is dimensionally stable, can be mechanically processed very well and can be used in a wide temperature range (approx. −240 ° C to +205 ° C).

Other features:

incombustible
Thermal conductivity : 0.209 W / (K m)
Tensile strength : 37 N / mm²
Shear strength : 59 N / mm²
Shear modulus : 1243 N / mm²
Compression modulus : 1243 N / mm²
Specific resistance at 50% rel. Humidity : 10 ¹⁸ cm ${\ displaystyle \ Omega}$
Dielectric strength : 20000 V / mm

Because of its unique properties, PCTFE is used in apparatus engineering (pumps, compressors, extreme deep-freeze applications, seals). It is also used as a film in the food and pharmaceutical packaging industries and in optical data processing.

brand names

Kel-F ( 3M ), production stopped in 1995
Neoflon ( Daikin Industries )
Aclar ( Honeywell )
Voltalef ( Arkema )

literature

JA Brydson: Plastics materials , 7th edition. Butterworth Heinemann, 1999, ISBN 978-0750641326 , pp 374-375.

Individual evidence

↑ ^a ^b ^c ^d ^e ^f ^g ^h data sheet on Boedeker.com .
↑ ^a ^b ^c J. A. Brydson: Plastics materials , 7th edition. Butterworth Heinemann, 1999, ISBN 978-0750641326 , pp 374-375.
↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
^ F. Schloffer, O. Scherer, Process for the representation of polymerisation products, DE-Patent 677071, IGFarbenindustrie Aktien-Gesellschaft, filing date: October 7, 1934 ( online ).

[Boedecker-1] ↑ ^a ^b ^c ^d ^e ^f ^g ^h data sheet on Boedeker.com .

[Brydson-2] J. A. Brydson: Plastics materials , 7th edition. Butterworth Heinemann, 1999, ISBN 978-0750641326 , pp 374-375.

[NV-3] This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.

[4] F. Schloffer, O. Scherer, Process for the representation of polymerisation products, DE-Patent 677071, IGFarbenindustrie Aktien-Gesellschaft, filing date: October 7, 1934 ( online ).