Polychlorotrifluoroethylene
- KEL -F ®
- NEOFLON ®
- PCTFE
- Polychlortrifluorethen
Thermoplastic
2.13 g · cm -3
212 ° C
38 N · mm -2
Shore D90
1429 N · mm 2
<0.01%
150%
4.99 · 10-4 cal · cm -1s -1 ° C-1
3.9 · 10-5 K-1
Polychlorotrifluoroethylene (abbreviated PCTFE ) is a fully halogenated polymer, which belongs to the class of Polyhalogenolefine. PCTFE is a homopolymer, which is built up from the monomer chlorotrifluoroethylene. Characteristic of PCTFE is the ( - CCIF - CF2 - ) n moiety. PCTFE is one of the thermoplastics.
History
PCTFE was discovered in 1934 by researchers at Hoechst. It is thus the longest known fluoroplastic.
Properties and Applications
PCTFE is like other fluoropolymers very resistant to many chemicals. In addition, PCTFE has the highest hardness, strength and stiffness among the fluoropolymers. PCTFE is dimensionally stable, highly machinable and may be in a wide temperature range ( approximately -240 ° C to 205 ° C ) are used.
Other features include:
- Incombustible
- Thermal conductivity: 0.209 W / ( m K )
- Tensile strength: 37 N / mm ²
- Shear strength: 59 N / mm ²
- Shear modulus: 1243 N / mm ²
- Compression modulus: 1243 N / mm ²
- Resistivity at 50 % RH. Humidity: 1018 cm
- Dielectric strength: 20,000 V / mm
PCTFE is used for its unique properties in process equipment (pumps, compressors, extreme low temperature applications, gaskets). There is used as the film in the food and pharmaceutical packaging, and optical data processing.