Polycyclohexylenedimethylene terephthalate

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Structural formula
Structural formula of PCT
General
Surname Polycyclohexylenedimethylene terephthalate
other names

PCT

CAS number 25037-99-4
Monomers 1,4-Cyclohexanedimethanol and dimethyl terephthalate
Molecular formula of the repeating unit C 16 H 18 O 4
Molar mass of the repeating unit 274.31 g mol −1
Type of polymer

Thermoplastic

properties
Physical state

firmly

safety instructions
GHS labeling of hazardous substances
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 .

Polycyclohexylenedimethylene terephthalate ( abbreviation PCT) is a thermoplastic polyester obtained by polycondensation of terephthalic acid and 1,4-cyclohexanedimethanol occurs (CHDM). The chemical structure is thus similar to polyethylene terephthalate (PET), with which it shares properties such as dimensional stability and chemical resistance. In addition, PCT is particularly temperature and hydrolysis resistant. At 285 ° C, the melting point is about 30 ° C higher than that of PET. Well-known trade names are Thermx ( Ticona ) and Eastar ( Eastman ).

application

Polycyclohexylenedimethylene terephthalate is dimensionally stable at higher temperatures (briefly up to 256 ° C), which makes the material suitable for the injection molding of thin-walled molded parts. PCT is often used for electronic components, such as plug connections . PCT is also processed into filaments , fibers and fabrics that are used as filters in industry, among other things. For other areas of application, the color stability and lower density are advantageous.

Individual evidence

  1. ↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
  2. ↑ DuPont Thermx PCT - high performance polyester resin: Product and Properties Guide ( Memento of March 7, 2012 in the Internet Archive ).

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