A fluorine containing monomer was synthesized and its polymer was prepared by aromatic nucleophilic substitution polycondensation of the monomer and 4,4′ difluorobenzophenone using potassium carbonate as the catalyst...A fluorine containing monomer was synthesized and its polymer was prepared by aromatic nucleophilic substitution polycondensation of the monomer and 4,4′ difluorobenzophenone using potassium carbonate as the catalyst and tetramethylene sulfone as solvent. The polymer properties were characterized by FTIR, NMR, DSC and the results showed that the T g of the polymer is 141 ℃ and the solubility of the polymer was obviously improved due to the introduction of (3 trifluoromethyl)phenyl group.展开更多
A kind of highly fluorinated bisphenol monomer was synthesized. It was characterized by FTIR, 1H NMR and MS. 6F PEEK and 6F PEEKK were prepared via aromatic nucleophilic substitution, based on [3,5 di(trifluoromethyl)...A kind of highly fluorinated bisphenol monomer was synthesized. It was characterized by FTIR, 1H NMR and MS. 6F PEEK and 6F PEEKK were prepared via aromatic nucleophilic substitution, based on [3,5 di(trifluoromethyl)] phenylhydroquinone and difluoro monomers. The T gs of 6F PEEK and 6F PEEKK are 423 and 436 K, respectively. The 6F polymers exhibit a high thermal stability and good solubility. The flexible, creasable and transparent thin films were easily obtained by compression moulding and solution casting.展开更多
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 ...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).展开更多
文摘A fluorine containing monomer was synthesized and its polymer was prepared by aromatic nucleophilic substitution polycondensation of the monomer and 4,4′ difluorobenzophenone using potassium carbonate as the catalyst and tetramethylene sulfone as solvent. The polymer properties were characterized by FTIR, NMR, DSC and the results showed that the T g of the polymer is 141 ℃ and the solubility of the polymer was obviously improved due to the introduction of (3 trifluoromethyl)phenyl group.
文摘A kind of highly fluorinated bisphenol monomer was synthesized. It was characterized by FTIR, 1H NMR and MS. 6F PEEK and 6F PEEKK were prepared via aromatic nucleophilic substitution, based on [3,5 di(trifluoromethyl)] phenylhydroquinone and difluoro monomers. The T gs of 6F PEEK and 6F PEEKK are 423 and 436 K, respectively. The 6F polymers exhibit a high thermal stability and good solubility. The flexible, creasable and transparent thin films were easily obtained by compression moulding and solution casting.
文摘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).
