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氟烷基
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  pseudo-perfluoroalkyl
     Study of properties of pseudo-perfluoroalkyl polysiloxanes
     氟烷基聚硅氧烷的性能研究
短句来源
     Study on preparation and properties of pseudo-perfluoroalkyl polysiloxanes
     氟烷基聚硅氧烷防水防油剂的制备与性能研究
短句来源
  perfluoroalkyl groups
     The result indicates that the Zisman critical surface tension of the fluorinated silicone polymers is 20.1 mN/m and composition of perfluoroalkyl groups is more than (80~0_0) concentration. The even coating was obtained on the surface of the fibers and the best concentration is 2~0_0. It is also investigated that perfluoroalkyl groups in the fluorinated silicone polymers is oriented and parallel to one another and normal to the substrate surface.
     结果表明:氟烷基聚硅氧烷的临界表面张力可以达到20.1mN/m,并且氟烷基所占的质量分数不小于8000.在纤维表面可以形成均匀的膜,较好成膜浓度为200,它在基质表面的定向排列方式为:全氟烷基朝外,—Si—O—键指向基质表面.
短句来源
  “氟烷基”译为未确定词的双语例句
     Research of Analytical Method about Fluorine-containing Textile Finishing Agent Monomer-1H,1H,2H,2H-Tetrahydroperfluorodecylacrylate
     含氟织物整理剂单体1H,1H,2H,2H-全氟烷基丙烯酸酯的分析方法研究
短句来源
     A spiro compound(2-(5-chloro-2,2,3,3,4,4,5,5-octafluoro-pentyl)-3-(1-iodineMethyl)-8,8-dimethyl-7,9-dioxa-spirodecane-6,10-dione) has been synthesized through several steps.
     通过多步反应合成了含有一个长链氟烷基的螺环化合物(2-(5-氯-2,2,3,3,4,4,5,5-八氟-戊烷基)-3-(1-碘-甲基)-8,8-二甲基-7,9-二氧杂-螺[4,5]癸烷-6,10-二酮)。
短句来源
     Study on the method of synthesizing lithium fluoroalkylphosphates
     氟烷基膦酸锂合成方法的研究
短句来源
     Fluoroalkylenaminoketones were obtained when the reaction was carried out at 40~50(°C).
     在40~50°C下,反应主要生成相应的氟烷基烯胺酮(3)。
短句来源
     How to prepare lithium fluoroalkylphosphate Li(C2F5)3PF3]is introduced in this paper. The speciality of Li]C2 F5)PF3]based electrolyte are compared with LiPF6,such as electro-chemical stab ility,ionic conductivity,flammability and stability to water.
     本文介绍了氟烷基膦酸锂盐的一种Li犤PF3(C2F5)3犦的制备做了介绍,并将Li犤PF3(C2F5)3犦的电解液和六氟磷酸锂(LiPF6)的电解液在对水的稳定性,电化学稳定性,离子导电性以及热稳定性方面做了比较。
短句来源
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  相似匹配句对
     SYNTHESIS OF N-FLUOROALKYL ISOINDOLINE
     N-氟烷二氢异吲哚的合成
短句来源
     The Chemistry of Perfluoroalkanesulfinates
     全氟烷亚磺酸盐化学
短句来源
     2. basal cell;
     细胞;
短句来源
     Silicon Carbide Based Composites
     碳化硅复合材料
短句来源
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  perfluoroalkyl groups
Modes ofgeneration of carbon-centered anions, radical species containing perfluoroalkyl groups are considered.
      
Synthesis of Heterocyclic Compounds Containing Perfluoroalkyl Groups.
      
This is due to the extremely low surface energy of perfluoroalkyl groups.
      
In addition, copoly(ACfn/ASi) membranes were ethanol permselective owing to water repellency of the perfluoroalkyl groups.
      
The strong resistance to loss of FPD after washing with a large quantity of water may be due to the water-repellent nature of the perfluoroalkyl groups.
      
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四氟乙烷磺酸内醋(I)或氟碳基全氟甲基磺酞氟(II)与氟化钾、四氟乙烯和氯化碘或碘在二乙二醇二甲醚中常压、反应,制得5-碘-3-氧杂全氟戊磺酞氟ICF_2CF_2CF_2S0_2F(III),它与四氟乙烯调聚得I(CF_2CF_2)_n+1OCF_2CF_2SO_2F, n=1, 2, 3, 4,·…利用Swans方法将此类碘化物转变成氟化物F(CF_2CF_2)_n+1OCF_2cF_2SO_2F,最后与碱作用生成钾盐.所有产物的结构均经元素分析、红外光谱、F核磁共振谱和层析分析确定.全氟烷基醚磺酸钾作为抑铬雾剂应用于镀铬工艺,其抑铬雾效果良好.在无机械排雾设备情况下,添加该钾盐0.02..,0.04克/升,可使铬雾逸出的最大浓度降低到0.005..,0.002毫克(三氧化铬)/米叹空气),能防止铬酸对人身之毒害,并可节约铬酸20...30,既免除了排雾设备及净化回收系统,又节约了动力.在镀铬中添加此种抑铬雾剂,对镀层的光亮度并无影响,

NMR and mass spectral data of seventeen monosubstituted fluoroalkylcyclopropanesare presented; the shielding effect of the fluoroalkyl groups on the ring-protons arediscussed.Fluorine substitution on the carbon α to the ring not only deshields all thering protons,but also produces another interesting effect.Whereas ordinary alkylside-chain causes a difference in shielding on the cis and trans protons with a Δδ-valueof--0. 4ppm,the Δδ-values of the above mentioned cyclopropanes are a function of thenumber of...

NMR and mass spectral data of seventeen monosubstituted fluoroalkylcyclopropanesare presented; the shielding effect of the fluoroalkyl groups on the ring-protons arediscussed.Fluorine substitution on the carbon α to the ring not only deshields all thering protons,but also produces another interesting effect.Whereas ordinary alkylside-chain causes a difference in shielding on the cis and trans protons with a Δδ-valueof--0. 4ppm,the Δδ-values of the above mentioned cyclopropanes are a function of thenumber of fluorine atoms substituted on the α-carbon.The Δδ-values are~0. 4,~0. 2and <0. 1 ppm for the three types of cyclopropanes:()-CH_2-R,()-CHF-Rand()-CF_2-R,respectively.Presumably,not only the diamagnetic anisotropy ofthe cyclopropyl-C_α bond,but also that of all the other bonds on C_α contribute to theshielding effects of the side-chain on the ring-protons.The mass spectra are also brieflydiscussed.

本文报导了十七个新的含氟烷基单取代环丙烷的核磁共振谱及质谱数据,着重讨论了含氟烷基对环上质子的屏蔽效应.烷基取代基中α碳(与环直接相联的碳)上的氢为氟原子取代之后,不仅使所有环上质子的化学位移向低场移动,并且使环上之顺式质子与反式质子的化学位移差Δδ减小,对应于三种类型的环丙烷:和相应的Δδ值分别为~0. 4、~0. 2和<0. 1ppm.这说明除了与环直接相联的 C-C 键外,与α碳相联的键(如 C-F 键)对环上质子的化学位移也有重大影响.文中对质谱也作了简单的讨论.

Perfluoroacyl fluoride was used to catalyze the reaction of cyanuric chloride with KF in diglyme at 80℃ to give cyanuric fluoride in 80-90% yield. At room temperature, cyanuric fluoride reacted with hexafluoropropene in the persence of KF to give monoand di-perfluoroisopropyl-s-triazine, however, with perfluoro-n-propyl-vinyl ether to give only small amount of the corresponding monoperfluoroalkyl product. The yield was not improved much even at 100℃ for 13.5 hrs. Both the fluorine atom and the perfluoroalkyl...

Perfluoroacyl fluoride was used to catalyze the reaction of cyanuric chloride with KF in diglyme at 80℃ to give cyanuric fluoride in 80-90% yield. At room temperature, cyanuric fluoride reacted with hexafluoropropene in the persence of KF to give monoand di-perfluoroisopropyl-s-triazine, however, with perfluoro-n-propyl-vinyl ether to give only small amount of the corresponding monoperfluoroalkyl product. The yield was not improved much even at 100℃ for 13.5 hrs. Both the fluorine atom and the perfluoroalkyl group of the partially substituted perfluoro-s-triazine were readily displaced by sodium methoxide, whereas treatment of the triazine with methanol in combination with the weaker bases calcium carbonate or potassium fluoride only the fluorine atom was displaced and the perfluoroalkyl group unaffected.

采用全氟酰氟为催化剂,三聚氰氯与氟化钾在二乙二醇二甲醚中于80℃反应,可制得三聚氰氟,产率为80~90%。当等克分子三聚氰氟与六氟丙烯在氟化钾催化下,室温反应18小时,即可得一、二全氟烷基取代产物。全氟正丙基乙烯基醚可以参与类似反应,但要困难得多。当等克分子全氟正丙基乙烯基醚与三聚氰氟在100℃反应13.5小时,大部分回收,只得少量的一取代产物。三嗪环上的全氟烷基及氟原子易被醇钠进攻。应用碱性较弱的碳酸钙或氟化钾作为酸的受体,可使三嗪环上的氟为甲氧基所取代,而保留全氟烷基

 
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