Wiktionary
polychlorotrifluoroethylene
n. (context organic chemistry English) A polymer of chlorotrifluoroethylene
Wikipedia
Polychlorotrifluoroethylene
Polychlorotrifluoroethene (PCTFE or PTFCE) is a thermoplastic chloro fluoropolymer with the molecular formula (CFCClF), where n is the number of monomer units in the polymer molecule. It is similar to polytetrafluoroethene (PTFE), except that it is a homopolymer of the monomer chlorotrifluoroethylene (CTFE) instead of tetrafluoroethene. It has the lowest water vapor transmission rate of any plastic.