C1s and O1s of the 3,5-bitrifluoromethylated poly（aryl ether） terminated with phenylethynyl moieties（2CF3-PAE-PEP） before/after crosslinking were tested by the X-ray photoeletron spectroscopy（XPS）. The measurements show that some of the C\O bonds in the molecule structure will be broken if the films are crosslinked in the air, which is able to form some new CO bonds with the oxygen in the air. However, the ratios of the groups in the films cured in nitrogen remain the same as that of the uncured samples. It is the the forth harmonic of the stretching vibration of CO bond(4νφC=O) that causes the absorption loss at the wavelength 1 382 nm.
Two novel poly(aryl ether ketone)s based on (3 methyl)phenylhydroquinone were synthesized via aromatic nucleophilic substitution reaction. The high molecular polymers were easily obtained because of the high reaction activity of bisphenol monomer. The traces of DSC showed that the T gs of m TPEEK and m TPEEKK were 421 and 432 K, respectively. The two polymers exhibit a high thermal stability and good solubility. The transparent and flexible films were readily prepared with chloroform solution. The film of m TPEEK had a low dielectric constant( ε =2 7).
