ring opening
英 [rɪŋ ˈəʊpənɪŋ]
美 [rɪŋ ˈoʊpənɪŋ]
网络 开环; 开环聚合; 开环反应; 开口挡圈
双语例句
- Nucleophilic ring opening of cyclic glycerothiophospholipid-nucleoside conjugate provides a simple and efficient path for the modification of glycerin skeleton.
通过环甘油磷脂核苷缀合物的亲核开环，为甘油结构修饰提供了一条简便有效的新路线。 - Low acid value resins were synthesized by E10 with low temperature ring opening.
采用E10低温开环酯化合成低酸值树脂。 - The process of ring opening reaction is proved through analyzing aminating mechanism by IR and NMR.
利用红外及核磁共振碳谱分析了胺化反应机理，证明是开氧环反应。 - Ring opening reaction of2,3-epoxy ketones with nitric oxide in dichloromethane occurred in a syn-selective fashion, producing syn-2-hydroxy nitrates as main products.
在二氯甲烷溶液中，一氧化氮导致2，3-环氧酮发生顺式开环反应，生成的顺式羟基硝酸酯化合物为主要产物。 - Its hydrogenation activity in aromatics saturation and ring opening activity were investigated.
芳烃加氢饱和及开环反应是一种提高柴油十六烷值的有效途径。 - Synthesis and Characterization of Soy-polyols by Ring Opening of ESO with Diethanolamine
二乙醇胺开环环氧大豆油制备大豆多元醇及其性能表征 - Their ring opening reactions can be used for preparing polyfunctional or other cyclic compounds.
综述了近年来各种五元氮杂环的开环反应及其在有机合成中的应用。 - By using cadmium acetate as catalyst, polyitaconic anhydride was prepared through ring opening polymerization of itaconic anhydride.
以衣康酸为原料合成了衣康酸酐，并在乙酸镉的催化作用下通过开环聚合得到了聚衣康酸酐。 - Our studies have laid stress on the process and condition of ring opening as well as ring-closure reaction.
分析讨论了开环和闭环反应机理及反应条件。 - The hydrogenation saturation of aromatics and selective ring opening of cycloalkane were the most important process during deep dearomatization of diesel oil.
单环芳烃的加氢饱和与环烷烃的选择开环是柴油深度脱芳过程中的重要反应。 - New type water developable photosensitive phenolic resins containing different quaternary ammonium salts were synthesized through ring opening reaction of epoxy phenolic resin with different triethylamine salts and acrylic acid.
通过不同的三乙胺盐及丙烯酸对环氧酚醛树脂的开环反应，合成了含不同季铵盐及丙烯酸酯基的新型水显影感光树脂。 - Lewis acid catalyzed acetylation of steroidal sapogenin was reinvestigated, and the previous assigned structures A, B and C of E/ F ring opening products were rectified as 1, 2 and 3 according to X ray diffraction analysis.
重新研究了Lewis酸催化的甾体皂甙元E/F螺环乙酰化开环反应，并通过波谱分析和单晶X衍射修正了原指定结构。 - Its double ring opening cationic polymerization was carried out in dichloroethane by using BF 3 · OEt 2as catalyst.
以BF3·OEt2为催化剂，在二氯乙烷中实现了其双开环阳离子聚合。 - This paper reports a new green ring opening reactions of aziridines with H_2O.
本文主要研究了一种利用氮杂环丙烷开环反应合成邻位氨基醇的有机新反应。 - Aziridine reacted with aromatic amines promoted by samarium trichloride the ring opening products of 1,2 diamines were obtained.
芳香族胺在三氯化钐催化下与环丙啶反应，得到了1，2－二胺类混合物； - Taking the reactive amino-polysiloxane with even amino distribution and polyoxyethylene-methyl-diglycidyl ether as raw material and through ring opening reaction, the polyether-modified amino-polysiloxane is composed, which can be applied to the softening finishing of fabrics.
以氨基分布均匀的反应性氨基聚硅氧烷和聚氧乙烯甲基缩水甘油醚为原料，通过开环反应，合成了可用于织物柔软整理的聚醚改性氨基聚硅氧烷。 - The applications of quaternary ammonium salt and crown ether as phase transfer catalysts for the nucleophilic substitution, anionic ring opening polymerization, and free radical polymerization are introduced.
介绍了季铵盐类及冠醚类相转移催化剂在高聚物的亲核取代反应、阴离子开环聚合反应及自由基聚合反应中的应用。 - Nucleophilic ring opening reaction of unsymmetric aziridines and its regioselectivity with various nucleophiles was reviewed systematically.
本文系统地总结了各类亲核试剂对非对称氮杂环丙烷（吖丙啶）的亲核开环反应及开环的区域选择性。 - The asymmetric epoxidation of the allylic alcohol and stereo-and regio-selective ring opening of epoxy alcohol are reviewed.
本文叙述了近年来烯丙醇的不对称环氧化与环氧醇的区域和立体选择性开环的新进展，并对这些方法作一评述。 - This work is related with the synthesis and epoxidation of hyperbranched polyesters from the ring opening polymerization of multifunctional acid anhydride and epoxy compounds.
本文研究了以多元酸酐和环氧化合物的开环聚合制备超支化聚酯，通过超支化聚酯的环氧化合成环氧化超支化聚酯的方法。 - Microwave-Assisted Ring Opening Polymerization of Caprolactone and Lactide
己内酯和丙交酯的微波辅助开环聚合反应 - Secondly, the ring opening polymerization of lactide was carried out in the bulk by initiating with stannous octoate.
并以其为聚合反应的单体，用辛酸亚锡做引发剂，在现有真空条件下，开环聚合生成聚乳酸。 - A novel energetic additive& polyazidodiphosphate was synthesized via esterification, ring opening and nucleophilic substitution reactions.
通过酯化、开环及亲核取代等反应，合成了一种新型含能添加剂&多叠氮双磷酸酯。 - Advances in the study on ring opening metathesis polymerization of norbornene and its derivatives
降冰片烯及其衍生物开环易位聚合的研究进展 - Using the coating deposition and direct reaction method, the metal-organic framework HKUST-1 and copper(ⅱ) malonate were loaded in the steel pipeline as Lewis acid catalysts for the solid-liquid phase catalytic ring opening reaction.
分别使用沉积法和直接反应镀层法，在微反应管道内负载了金属－有机骨架材料HKUST-1和丙二酸铜作为Lewis酸催化剂，进行了氧化苯乙烯的固－液相催化开环反应。 - We have a study on the effect of the amount of additives, the proportion of raw materials, ring opening reaction time, closed loop temperature, alkali rate and so on, then select the optimum reaction process.
研究了反应过程中的助剂用量、原料比例、开环反应时间、闭环温度、加碱时间的影响，从而确定了最佳的合成工艺。 - Finally, we tried to load the solid phase catalyst into the microreactor to catalyze the ring opening reaction of styrene oxide.
最后，我们尝试在微反应管道中负载固相催化剂，来进行氧化苯乙烯的酸催化开环反应。 - The results showed that with the increase of the number of thiophene introduced, characteristic absorption spectrum for the synthesized compounds moved to visible zone gradually and red shift occured for the ring opening products.
结果表明：随着引入噻吩基团的增加，合成化合物吸收光谱的特征吸收峰逐步移向可见区，开环体特征吸收峰也相继发生了红移。 - Different molecular weight linear aliphatic polyester PCL were synthesised by ring opening polymerization on the different reaction conditions.
在不同反应条件下采用开环聚合合成具有不同分子量的线性脂肪族聚酯PCL。 - We have a thorough discussion of the epoxidation and ring opening reaction mechanism and stereochemistry.
结合单晶数据分析，对环氧化反应、环氧环开环反应的机理和立体化学进行了深入探讨。