酯基

此外，底物中苄位的氰基还可以替换为酯基，从而使该方法还可以用来合成N-取代（芳基或烷基）-吲哚-3-羧酸酯类衍生物。

In addition , the benzylic cyano group in such substrates can be replaced by an ester group , which makes the method applicable to the synthesis of N-aryl or N-alkyl-indole-3-carboxylic ester derivatives .

含酯基的防老剂可起到两臂偶联剂的作用，与活性种反应生成双倍峰，产物带有粉红色；

Some antioxidants with ester group can be used as linear coupled reagent , double peaks will come into being when they react to active centers , and pink will be found in their products .

最后，将B中的酯基皂化，获得含羧基的水溶性聚硅氧烷（C）。

Polysiloxanes ( C ) containing carboxyl were prepared by saponification of ester group in B. The IR .

PVC热稳定剂酯基锡的研究现状与展望

Developing status and Prospect of ester tin as PVC heat stabilizer

e.左右，噻唑烷环上的C2构型对催化反应结果无影响，C4位上酯基的影响也不大。

It was sound that the configuration of C2 in thiazolidine had no effect on the catalytic reaction .

酯基锡（丁酯）的合成及其对PVC的加工稳定性

Synthesis of ester-tin ( butyl acrylate ) and processing stability for PVC

报导了水基和酯基磁性流体的非线性声参量B／A值随浓度和温度的变化关系。

The acoustic nonlinearity parameter B / A values of water-based and diphthalate-based magnetic fluids are measured with the change of concentration and temperature .

含芳香酯基液晶基元环氧树脂固化动力学FTIR研究

Curing kinetics of a liquid crystalline epoxy with the aromatic ester mesogen by FTIR

IR上1050～1300cm~（-1）区域酯基吸收峰位置的预测

Numerical Estimation of Peak Positions for the 1050 ~ 1300cm ~ ( - 1 ) Absorption Band of an Ester Group in Infrared Spectra

FT-IR、NMR、XPS测试发现酯基上的氧原子参与络合。

The complexation between ions and oxygens of ester groups is found with FT-IR , NMR , and XPS techniques .

PET分子结构的酯基和苯环形成共轭体系，增加了分子链的刚性，性能十分优异。

Conjugated system was formed by ester and benzene of PET molecular structure , so , molecular chain rigidity was promoted and performance was very excellent .

通过2-（甲氧羰基）丙基甲基二氟硅烷（A）与2-（乙酰氧基）乙基甲基二氯硅烷（B）的共水解缩聚反应，得到含酯基的聚硅氧烷（C）。

Polysiloxanes ( C ) containing ester groups were obtained by cohydrolysis of 2 - ( carbomethoxy ) propyl methyl dichlorosilane ( A ) and 2 - ( acetoxy ) ethyl methyl dichlorosilane ( B ) .

报道了双羟甲基-18-冠-6及其正丁基、烯丙基、酯基、羧酸基衍生物的合成。所合成的八种新冠醚化合物的结构已经IR、MS、NMR、元素分析证实。

In this paper , bis ( hydroxymethyl ) - 18-crown-6 and seven derivatives were synthesized and characterized by elemental analyses , MS , IR and1H NMR spectroscopy .

充油SBS在生产过程中的变色主要是由于偶合后残存的SB活性链与防老剂1076的酯基反应引起的；

The discolorment in procedure of oil-extended SBS was mainly caused by the reaction of Antioxidant 1076 and vestigial active SB after the coupling reaction .

通过对该合聚物的IR和NMR谱图分析，得知该聚合物含有酯基和酮基的结构单元，以及环缩醛的侧链。

The IR and NMR spectra of the polymers indicated that the polymer structure contained ester and ketone units in the backbone , and a cyclic acetals as side chain .

另外，经FTIR证实，铜与木材作用时，主要是半纤维素中的羧基团和木质素中的酚羟基及芳基酯基与铜成键。

The carboxylic groups in hemicellulose and the phenolic hydroxyl and ester groups in lignin are the major bonding sites for copper , as confirmed by FTIR .

一种带有酯基并键合电子给体的新型Ru（bpy）3的设计、合成及光谱和电化学性能

Synthesis and Spectral Properties of a New Ruthenium ( II ) Tris-bipyridine with Four Ester Groups and Substituted Phenol

研究了萘磺酸盐、氨基磺酸盐、密胺树脂及酯基磺酸盐4种混凝土减水剂对两个级别水镁石纤维的叩解度、粘度及zeta电位的影响。

Effects of four types of superplasticizer to the beating degrees , viscosities and ZETA potentials of two grades of brucite fibers were investigated .

概述了烷基链中含有酰胺基和酯基的Gemini阳离子表面活性剂的合成、表面活性和生物降解性。

The synthesis of new types of Gemini cationic surfactants with amide or ester groups in hydrophobic chain and their surface-active and biodegradation properties are reviewed .

最后，本文以ETP为原料，合成了具有柔顺主链的端环碳酸酯基聚醚（CCP）。

Finally , cyclic carbonate-terminated polyether ( CCP ) with flexible backbone was synthesized using ETP as the raw material .

酯基锡热稳定剂是一类性能优异、应用广泛、高效低毒的新型有机锡类热稳定剂，作为PVC的热稳定剂，它具有广阔的应用和发展前景。

Ester-tin is a kind of organo-tin heat stabilizer which has good properties , wide application , high effects and low poison . It 's used as PVC heat stabilizer , and has a bright future .

此外，共聚物的LCST还受到共聚物的分子量和氨酯基单元含量的影响。

In additon , the LCST values of the copolymers were also influenced by their molecular weights and urethane contents .

丙酸甲酯是重要的有机化工原料，在过去的研究中大多是利用CO+CH3OH与乙烯氢酯基化反应而合成。

Methyl propionate is an important organic chemical raw material .

合金的特性粘度增加，其动态模量增加，而且相转变损耗峰向高温方向移动。其中β松弛损耗峰是由于酯基－COO－的运动引起的，它的峰值随合金特性粘度增加而下降。

With increasing the intrinsic viscosity , the dynamic moduli increase , the mechanical loss peaks shifted to high temperture and β loss peak from - C-O - vibration decreased .

O1（羧基和酯基氧的比率）增加，O3（羟基氧的比率）减少。

The ratios of O 1 ( oxygen of carboxyl and ester ) were increased and O 3 ( hydroxyl oxygen ) in O 1s decreased .

引入具有拉电子性质的基团，如羧酸酯基，则会部分抵消由于C60共扼结构被破坏而引起的电位负移，结果使得电位负移值减少。

Introducing electron-withdrawing groups , such as carboxylic ester groups , compensate part of negative shift of the reduction wave due to the effect of the saturation of a fullerene double bond .

X射线晶体结构的分析表明该化合物含羰基、酰胺基、酯基与溴原子，并且通过N（2）H与O（2）分子间氢键连成一维链状结构。

The X-ray crystal structure analysis revealed that the compound has carbonyl group , carboxyamide group , ester group and bromine atom , and the one dimension chain structure of the title compound is formed through the hydrogen bond between N ( 2 ) H and O ( 2 ) .

自由基降解法和PG寡糖修饰法适合制备具有高硫酸酯基取代度的PGS寡糖，但这种高硫酸酯基取代度PGS寡糖的分离较为困难。

The free radical degradation and chemical sulfation of PG oligosaccharides method are suitable to prepare PGS oligosaccharides with high degrees of sulfate substitution , but it is difficult to separate these PGS oligosaccharides .

利用低分子量聚己内酯二醇（PCL）与甲苯二异氰酸酯（TDI）反应，形成端氰酸酯基的聚氨酯型聚己内酯，然后分别与未改性淀粉及己内酯接枝改性淀粉混合。

Polycaprolactone-urethane with cyanate group has been synthesised by low molecular PCL dio with toluene diisocynate ( TDI ) . Then non-grafting starch or modifying starch was mixed with Polycaprolactone-urethane . Non-grafting starch and Polycaprolactone-urethane formed plastic with chemical reaction .

实验结果表明：酯基类型及数量对淀粉/PVA混合浆液的相分离行为有明显影响，BA链节有利于混合浆液的稳定性，而MA和MMA则能获取相对较低的相分离程度。

Experiments has indicated that ester type and content has significant impact on the phase separation of mixed starch / PVA size . BA link helps the stability of mixed size , while MA and MMA can achieve relatively lower separation extent of phase .