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
The crosslinkable trifluoromethylated poly(aryl ethers) terminated with phenylethynyl moieties(11F-PAE-PEP)s were prepared in two step syntheses. The structure of 11F-PAE-PEP was confirmed by FTIR and 1H NMR. The cros...The crosslinkable trifluoromethylated poly(aryl ethers) terminated with phenylethynyl moieties(11F-PAE-PEP)s were prepared in two step syntheses. The structure of 11F-PAE-PEP was confirmed by FTIR and 1H NMR. The crosslinking behavior was studied by DSC. There is a remarkable increase of T g after crosslinking of the poly(aryl ethers). The T g values of crosslinked polymers were 437 and 446 K, respectively. The crosslinked polymers could not be soluble in common organic solvents, such as N,N-dimethylformamide, N,N-dimethylacetamide, N-methyl-2-pyrrolidinone, chloroform, and tetrahydrofuran. The temperatures at a 5% mass loss of the crosslinked polymers in air were above 789 K. They showed a good optical property, too. This kind of polymers will be the promising materials used as the microelectronics and optical waveguide devices.展开更多
A kind of high Fluorine-containing poly(aryl ether) without side reaction was synthesized in a two-step synthesis. Its structure was confirmed by FTIR, 1H NMR and 19F NMR. The polymer shows an excellent thermal stabil...A kind of high Fluorine-containing poly(aryl ether) without side reaction was synthesized in a two-step synthesis. Its structure was confirmed by FTIR, 1H NMR and 19F NMR. The polymer shows an excellent thermal stability, good solubility, low water absorption, low dielectric constant and low refractive index. Flexible and transparant thin film can be easily obtained by compression moulding or solution casting. The polymer would be a promising material used for microelectronics and waveguide devices.展开更多
A type of novel crosslinkable poly(aryl ether ketone)s containing pendent phenylethynyl moieties(PEP-PAEK-Fn) were synthesized. The polymers were prepared by copolycondensation reaction of difluoro-monomer with potass...A type of novel crosslinkable poly(aryl ether ketone)s containing pendent phenylethynyl moieties(PEP-PAEK-Fn) were synthesized. The polymers were prepared by copolycondensation reaction of difluoro-monomer with potassium salt of 4-phenylethynylphenyl hydroquinone(PEP-PH) and 4,4′-isopropylidenediphenol(BPA). The Mns and Mw/Mns of polymers determined by GPC with polystyrene standard were 46700, 100000 and 1.6, respectively. The resulting polymers were thermally crosslinked at 370 ℃ for 2 h in N2 atmosphere. The glass transition temperature is increased after crosslinking. The cured polymers show a good chemical resistance and high thermal stability up to 500 ℃ under nitrogen.展开更多
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).
文摘The crosslinkable trifluoromethylated poly(aryl ethers) terminated with phenylethynyl moieties(11F-PAE-PEP)s were prepared in two step syntheses. The structure of 11F-PAE-PEP was confirmed by FTIR and 1H NMR. The crosslinking behavior was studied by DSC. There is a remarkable increase of T g after crosslinking of the poly(aryl ethers). The T g values of crosslinked polymers were 437 and 446 K, respectively. The crosslinked polymers could not be soluble in common organic solvents, such as N,N-dimethylformamide, N,N-dimethylacetamide, N-methyl-2-pyrrolidinone, chloroform, and tetrahydrofuran. The temperatures at a 5% mass loss of the crosslinked polymers in air were above 789 K. They showed a good optical property, too. This kind of polymers will be the promising materials used as the microelectronics and optical waveguide devices.
文摘A kind of high Fluorine-containing poly(aryl ether) without side reaction was synthesized in a two-step synthesis. Its structure was confirmed by FTIR, 1H NMR and 19F NMR. The polymer shows an excellent thermal stability, good solubility, low water absorption, low dielectric constant and low refractive index. Flexible and transparant thin film can be easily obtained by compression moulding or solution casting. The polymer would be a promising material used for microelectronics and waveguide devices.
文摘A type of novel crosslinkable poly(aryl ether ketone)s containing pendent phenylethynyl moieties(PEP-PAEK-Fn) were synthesized. The polymers were prepared by copolycondensation reaction of difluoro-monomer with potassium salt of 4-phenylethynylphenyl hydroquinone(PEP-PH) and 4,4′-isopropylidenediphenol(BPA). The Mns and Mw/Mns of polymers determined by GPC with polystyrene standard were 46700, 100000 and 1.6, respectively. The resulting polymers were thermally crosslinked at 370 ℃ for 2 h in N2 atmosphere. The glass transition temperature is increased after crosslinking. The cured polymers show a good chemical resistance and high thermal stability up to 500 ℃ under nitrogen.
