In the case of Pd(PPh3)4 as catalyst and toluene as reaction solvent, the desired biaryls and polyaryls were synthesized in excellent yield and on a large scale.
A novel diacid chloride, 2-（4-chlorocarboxyphenyl）-4-[3,5-dimethyl-4-（4-chlorocarbo-xylphenoxy）phenyl]-2,3-phthalazin-l-one 2, was synthesized and used for the preparation of polyarylates with inherent viscosities...A novel diacid chloride, 2-（4-chlorocarboxyphenyl）-4-[3,5-dimethyl-4-（4-chlorocarbo-xylphenoxy）phenyl]-2,3-phthalazin-l-one 2, was synthesized and used for the preparation of polyarylates with inherent viscosities of 0.25-0.37 dL·g^-1. The glass transition temperatures of polyarylates were in the range of 217-272℃. The temperatures at 10% weight loss of polyarylates were found to be in the range of 434-464℃ in nitrogen atmosphere and their structure was confirmed by FTIR and IH NMR. The amorphous polyarylates exhibited excellent solubility in a variety of solvents such as NMP, DMAc, DMF and chloroform.展开更多
Substituted polyaryls were synthesized successfully via sterically hindered double Suzuki cross-couplings of arylboronic acids with aryl dibromides in the presence of Pd（PPh3）4 and KOtBu within a very short time. ？...Substituted polyaryls were synthesized successfully via sterically hindered double Suzuki cross-couplings of arylboronic acids with aryl dibromides in the presence of Pd（PPh3）4 and KOtBu within a very short time. ？2009 Guo Hua Gao. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.展开更多
以苯磺酰氯/吡啶/N,N-二甲基甲酰胺的混合物为缩合剂,采用双酚A与双(4-羧苯基)苯基氧化膦(BCPPO)通过高温溶液缩聚,制备了一种新型的双酚A型聚芳酯PAR-P,并与双酚A和对苯二甲酸反应制备的传统双酚A型聚芳酯PAR-T作为对照,系统研究了含...以苯磺酰氯/吡啶/N,N-二甲基甲酰胺的混合物为缩合剂,采用双酚A与双(4-羧苯基)苯基氧化膦(BCPPO)通过高温溶液缩聚,制备了一种新型的双酚A型聚芳酯PAR-P,并与双酚A和对苯二甲酸反应制备的传统双酚A型聚芳酯PAR-T作为对照,系统研究了含磷聚芳酯的结构与性能。PAR-P和PAR-T的特性黏数分别为0.86和0.34 dL g 1;广角X射线衍射(WAXD)、差示扫描量热法(DSC)、动态力学分析(DMA)和热失重分析(TGA)测试结果表明:PAR-P为非晶聚合物,PAR-T为结晶聚合物;PAR-P比PAR-T具有更好的热稳定性;溶解性测试结果表明:PAR-P在常温或加热的条件下可以溶于常见的有机溶剂,但PAR-T溶解性较差。阻燃性测试结果表明:PAR-P具有良好的阻燃性能。展开更多
基金Support from the University of Science and Technology of China the National Natural Science Foundation of China are gratefully acknowledged (NO. 50073021).
文摘In the case of Pd(PPh3)4 as catalyst and toluene as reaction solvent, the desired biaryls and polyaryls were synthesized in excellent yield and on a large scale.
文摘A novel diacid chloride, 2-（4-chlorocarboxyphenyl）-4-[3,5-dimethyl-4-（4-chlorocarbo-xylphenoxy）phenyl]-2,3-phthalazin-l-one 2, was synthesized and used for the preparation of polyarylates with inherent viscosities of 0.25-0.37 dL·g^-1. The glass transition temperatures of polyarylates were in the range of 217-272℃. The temperatures at 10% weight loss of polyarylates were found to be in the range of 434-464℃ in nitrogen atmosphere and their structure was confirmed by FTIR and IH NMR. The amorphous polyarylates exhibited excellent solubility in a variety of solvents such as NMP, DMAc, DMF and chloroform.
基金supported by National Natural Science Foundation of China(No.20873041)Shanghai Leading Academic Discipline Project(No.B409).
文摘Substituted polyaryls were synthesized successfully via sterically hindered double Suzuki cross-couplings of arylboronic acids with aryl dibromides in the presence of Pd（PPh3）4 and KOtBu within a very short time. ？2009 Guo Hua Gao. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.
文摘以苯磺酰氯/吡啶/N,N-二甲基甲酰胺的混合物为缩合剂,采用双酚A与双(4-羧苯基)苯基氧化膦(BCPPO)通过高温溶液缩聚,制备了一种新型的双酚A型聚芳酯PAR-P,并与双酚A和对苯二甲酸反应制备的传统双酚A型聚芳酯PAR-T作为对照,系统研究了含磷聚芳酯的结构与性能。PAR-P和PAR-T的特性黏数分别为0.86和0.34 dL g 1;广角X射线衍射(WAXD)、差示扫描量热法(DSC)、动态力学分析(DMA)和热失重分析(TGA)测试结果表明:PAR-P为非晶聚合物,PAR-T为结晶聚合物;PAR-P比PAR-T具有更好的热稳定性;溶解性测试结果表明:PAR-P在常温或加热的条件下可以溶于常见的有机溶剂,但PAR-T溶解性较差。阻燃性测试结果表明:PAR-P具有良好的阻燃性能。
