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A high molecular weight aromatic polyether-ketone has been prepared by polycon-densation of diphenyl ether with m-phthalyl chloride under conventional coditions. Ethy-lene dichloride was chosen as the media and aluminum chloride as the catalyst in the polycondensation. It was found that the remainder of aluminium chloride in the product was conveniently removed by treating the reaction mixture with nitrobenzene. Analysis of infrared spectra indicates that not only para-but also orthopositions of the benzene...

A high molecular weight aromatic polyether-ketone has been prepared by polycon-densation of diphenyl ether with m-phthalyl chloride under conventional coditions. Ethy-lene dichloride was chosen as the media and aluminum chloride as the catalyst in the polycondensation. It was found that the remainder of aluminium chloride in the product was conveniently removed by treating the reaction mixture with nitrobenzene. Analysis of infrared spectra indicates that not only para-but also orthopositions of the benzene rings of the aromatic ether take part in the polycondensation. The chief properties of the polyether-ketone are listed.

本文研完了以1,2-二氯乙烷为溶剂,三氯化铝为催化剂,在一般条件下从二苯醚和间苯二甲酰氯合成高分子量聚芳醚酮(简称PEK)的方法;寻找出硝基苯脱催化剂提纯聚合物的有效途径;红外光谱表明醚的芳环上邻位和对位都参与了反应;测试了PEK的主要物理、化学性能。

In order to increase the mechanical strength of the products, different methods were used for the preparation of Furfural-diethylenetriamine,Furfural-triethanolamine, Furfural-triethanolamine-diethylenetriamine and Furfural-triethanolamine-polyethylenepolyamine condensation polymers,a weakly basic anion exchange resin. From the experimental resultts,it was known that ether by the addition of a certain amount of Furfural,a better mechanical strength of weakly basic anion exchange resin could be obtained, with...

In order to increase the mechanical strength of the products, different methods were used for the preparation of Furfural-diethylenetriamine,Furfural-triethanolamine, Furfural-triethanolamine-diethylenetriamine and Furfural-triethanolamine-polyethylenepolyamine condensation polymers,a weakly basic anion exchange resin. From the experimental resultts,it was known that ether by the addition of a certain amount of Furfural,a better mechanical strength of weakly basic anion exchange resin could be obtained, with the help of IR and ESR methods,it has been found that the reaction mechanism and. properties depend upon the structures of these weakly basic anion exchange resins.

糠醛分别和二乙三胺、二乙三胺与1,2-二氯乙烷的反应物、三乙醇胺、三乙醇胺与二乙三胺的混合物、三乙醇胺与多乙多胺的混合物共缩聚,得到了数种黑色无定形弱碱性阴离子交换树脂.测定了这些弱碱树脂的某些性能.结果表明:机械强度有所改善,树脂膨胀性较小,体积交换量较大,因此该类弱碱树脂具有一定的实用价值.特别引人注目的是,其中某些弱碱树脂的实测交换量与由树脂含氮量计算所得的理论交换量不相符:有的远低于理论交换量,有的则略高于理论交换量,作者通过对其IR谱的解析研究,探讨了上述缩聚反应的反应机理,并综合IR谱和ESR谱的解析,从结构与性能的关系上,分析了该类弱碱树脂的实测交换量和理论交换量之间相符与否的原因。

The reaction conditions and the factors influencing the form of isomers in which carbazole and N- alkylcathazoles are nitrated in 1, 2 - dichloroethane are studied. A series of aminocarbazoles are obtained by reducing the nitrocarbazo - les using Na2S as a reducing agent. The results show that 1. 2 - dichloroethane is a good nitration solvent. In this medium, carbazole and its N- derivatives are nitrated principally to 3 -nitrocarbazoles or 3, 6-dinitrocarbazoles. Reaction con- ditions affect the form of isomers....

The reaction conditions and the factors influencing the form of isomers in which carbazole and N- alkylcathazoles are nitrated in 1, 2 - dichloroethane are studied. A series of aminocarbazoles are obtained by reducing the nitrocarbazo - les using Na2S as a reducing agent. The results show that 1. 2 - dichloroethane is a good nitration solvent. In this medium, carbazole and its N- derivatives are nitrated principally to 3 -nitrocarbazoles or 3, 6-dinitrocarbazoles. Reaction con- ditions affect the form of isomers. The more bolky alkyl-substituents on the carbazole nucleus may change the proportions of the isomers. High yields and purer aminocarbazoles are obtained by reducing the nitrocarbazoles and N -alky- lnitrocarbazoles in aqueous and EtOH medium respectively with Na2S.

研究了咔唑和 N-烷基咔唑在 1,2-二氯乙烷介质中的硝化反应条件以及影响硝 基异构体的因素。用硫化钠为还原剂对硝基咔唑进行还原制得了一系列氨基咔唑。 结果表明:1,2-二氟乙烷是一种良好的硝化介质,咔唑及其N-烷基衍生物在该介 质中硝化主要生成3-硝基物和3.6-二硝基物,反应条件对异构体的生成有一定影 响。引入不同取代基可改变异构体比例,用硫化钠还原,硝基咔唑以水为介质, N-烷基硝基咔唑以乙醇为介质,得到高收率高纯度的氨基咔唑。

 
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