Teflon (polytetrafluoroethylene) is prepared by the addition polymerisation of tetrafluoroethylene (CF_2=CF_2
)underhighpressureinthepresenceofafreeradicalcatalyst.<br><br>Nylon−6,6isacondensationpolymerformedfromhexamethylenediamineandadipicacid.<br><br>Novolacisacondensationpolymerformedfromphenolandformaldehyde.<br><br>Dacron(polyethyleneterephthalate)isacondensationpolymerformedfromethyleneglycolandterephthalicacid.<br><br>Answer:Teflon