A novel cross-linking process using two high molecular weight aromatic poly（thioether）s, which were synthesized by the reactions of 4,4＇-thiobisbenzenethiol with 4,4＇-difluorobenzophenone and 4,4＇-difluorodipheny...A novel cross-linking process using two high molecular weight aromatic poly（thioether）s, which were synthesized by the reactions of 4,4＇-thiobisbenzenethiol with 4,4＇-difluorobenzophenone and 4,4＇-difluorodiphenylsulfone, respectively, and commercially available lower molecular weight poly（p-phenylene sulfide） was investigated. These reactions were carried out in bulk by the addition of silver tetrafluroborate and α,α＇-dibromo-p-xylene at 190℃ over a period of 45 min. Furthermore, the same procedure could be modified to cross-link compression-molded films of these three polymers. The thermal and solubility behaviors of these polymers before and after cross-linking reactions, are presented.展开更多
Fluoro-terminated hyperbranched（poly（aryl） ether ketone）（HPOP-PEEK-F） with 4-phenoxyphenyl side groups was prepared from A2（2-（4-phenoxyphenyl）-1,4-diphenol） and B3（1,3,5-tris[4-（4-flourobenzoyl） phenoxy]...Fluoro-terminated hyperbranched（poly（aryl） ether ketone）（HPOP-PEEK-F） with 4-phenoxyphenyl side groups was prepared from A2（2-（4-phenoxyphenyl）-1,4-diphenol） and B3（1,3,5-tris[4-（4-flourobenzoyl） phenoxy]benzene） with a function group ratio of 0.48:1（A2:B3）.The chemical structure of HPOP-PEEK-F was confirmed by FTIR and（）1H-NMR.The degree of branching（DB） of HPOP-PEEK-F was 0.66 determined by（）1H-NMR measurements.The phenyl ethynyl-terminated hyperbranched poly（ether ether ketone）（HPOP-PEEK-PEP） was prepared by the end-capping approach.The HPOP-PEEK-PEP showed high glass transition temperature than HPOP-PEEK-F,but exhibited lower thermal stability.After cross-linking,the glass transition temperature,thermal stability and anti-chemical corrodibility of HPOP-PEEK-PEP were all improved.展开更多
文摘A novel cross-linking process using two high molecular weight aromatic poly（thioether）s, which were synthesized by the reactions of 4,4＇-thiobisbenzenethiol with 4,4＇-difluorobenzophenone and 4,4＇-difluorodiphenylsulfone, respectively, and commercially available lower molecular weight poly（p-phenylene sulfide） was investigated. These reactions were carried out in bulk by the addition of silver tetrafluroborate and α,α＇-dibromo-p-xylene at 190℃ over a period of 45 min. Furthermore, the same procedure could be modified to cross-link compression-molded films of these three polymers. The thermal and solubility behaviors of these polymers before and after cross-linking reactions, are presented.
文摘Fluoro-terminated hyperbranched（poly（aryl） ether ketone）（HPOP-PEEK-F） with 4-phenoxyphenyl side groups was prepared from A2（2-（4-phenoxyphenyl）-1,4-diphenol） and B3（1,3,5-tris[4-（4-flourobenzoyl） phenoxy]benzene） with a function group ratio of 0.48:1（A2:B3）.The chemical structure of HPOP-PEEK-F was confirmed by FTIR and（）1H-NMR.The degree of branching（DB） of HPOP-PEEK-F was 0.66 determined by（）1H-NMR measurements.The phenyl ethynyl-terminated hyperbranched poly（ether ether ketone）（HPOP-PEEK-PEP） was prepared by the end-capping approach.The HPOP-PEEK-PEP showed high glass transition temperature than HPOP-PEEK-F,but exhibited lower thermal stability.After cross-linking,the glass transition temperature,thermal stability and anti-chemical corrodibility of HPOP-PEEK-PEP were all improved.
基金Supported by the Youth Foundation of Education Bureau of Hunan Province(1014586)the Key Project of State Forestry Administration(2006-12)the Important Project of Ministry of Education
