A novel crosslinkable fluorinated poly(ether ether ketone) with acetylenylbenzene end groups was prepared by solution condensation. The chemical structure of such polymer was confirmed by FTIR and 1H NMR. The crosslin...A novel crosslinkable fluorinated poly(ether ether ketone) with acetylenylbenzene end groups was prepared by solution condensation. The chemical structure of such polymer was confirmed by FTIR and 1H NMR. The crosslinking behavior and thermal stability were investigated by DSC and TGA respectively. The DSC thermogram for the first heating run shows a glass transition of 6F-PEEK at about 395 K and a exothermic peak correspongding to the self-crosslinking reaction of fluorinated poly(ether ether ketong) at about 700 K. For the second heating run, the exothermic peak disappered and the glass transition shifted to a higher temperature. The crosslinked polymer shown excelent thermal stability and solvent-resistence. The temperature for 5% weight loss was 774 K and the self-crosslinked polymer was no more disolved by polar solvents, which disolved in before crosslinking, such as DMF, DMAc and NMP. This kind of polymer may be a potential material used as electro-optical devices.展开更多
A novel poly(ether ether ketone) derived from 2 (6 oxide 6H dibenz〈c, e〉〈1, 2〉oxa phospho rin 6 yl) 1,4 dihydroxyphenylene, 4, 4′ diflourodiphenylketone and bisphenol A was synthesized by solution polycondensatio...A novel poly(ether ether ketone) derived from 2 (6 oxide 6H dibenz〈c, e〉〈1, 2〉oxa phospho rin 6 yl) 1,4 dihydroxyphenylene, 4, 4′ diflourodiphenylketone and bisphenol A was synthesized by solution polycondensation. The influences of reaction time, and concentration of reactants on the polymerization were investigated . A copolymer with inherent viscosity of 1 44 was obtained. As characterized by FT IR, 1 H NMR and 31 P NMR the product was a terpolymer, consisted of bisphenol A and difluorodiphenylketone. The DSC analysis show its T g was 171 ℃. The copolymer was soluble in many polar solvents.展开更多
A novel controllable cross\|linking PEEK was synthesized by introducing thioether moieties into PEEK rigid chain, in which sulfur acts as a cross\|linking point. It is found that the cross\|linking reaction could take...A novel controllable cross\|linking PEEK was synthesized by introducing thioether moieties into PEEK rigid chain, in which sulfur acts as a cross\|linking point. It is found that the cross\|linking reaction could take place at 623 K over a period of 5 h. The novel material has an excellent thermal stability and mechanical properties. It can be processed as convenient as that of pure PEEK before cross\|linking and has a high application temperature as thermosetting resin after cross\|linking.展开更多
文摘A novel crosslinkable fluorinated poly(ether ether ketone) with acetylenylbenzene end groups was prepared by solution condensation. The chemical structure of such polymer was confirmed by FTIR and 1H NMR. The crosslinking behavior and thermal stability were investigated by DSC and TGA respectively. The DSC thermogram for the first heating run shows a glass transition of 6F-PEEK at about 395 K and a exothermic peak correspongding to the self-crosslinking reaction of fluorinated poly(ether ether ketong) at about 700 K. For the second heating run, the exothermic peak disappered and the glass transition shifted to a higher temperature. The crosslinked polymer shown excelent thermal stability and solvent-resistence. The temperature for 5% weight loss was 774 K and the self-crosslinked polymer was no more disolved by polar solvents, which disolved in before crosslinking, such as DMF, DMAc and NMP. This kind of polymer may be a potential material used as electro-optical devices.
文摘A novel poly(ether ether ketone) derived from 2 (6 oxide 6H dibenz〈c, e〉〈1, 2〉oxa phospho rin 6 yl) 1,4 dihydroxyphenylene, 4, 4′ diflourodiphenylketone and bisphenol A was synthesized by solution polycondensation. The influences of reaction time, and concentration of reactants on the polymerization were investigated . A copolymer with inherent viscosity of 1 44 was obtained. As characterized by FT IR, 1 H NMR and 31 P NMR the product was a terpolymer, consisted of bisphenol A and difluorodiphenylketone. The DSC analysis show its T g was 171 ℃. The copolymer was soluble in many polar solvents.
文摘A novel controllable cross\|linking PEEK was synthesized by introducing thioether moieties into PEEK rigid chain, in which sulfur acts as a cross\|linking point. It is found that the cross\|linking reaction could take place at 623 K over a period of 5 h. The novel material has an excellent thermal stability and mechanical properties. It can be processed as convenient as that of pure PEEK before cross\|linking and has a high application temperature as thermosetting resin after cross\|linking.
