查询词典 basic anhydride

Can with water, alcohol and ammonia reaction, difference generate acids, esters and amides, the reaction rate than the corresponding ester and anhydride fast.

可与水，醇和氨反应，分别生成酸、酯和酰胺，反应速度比相应的酯和酸酐快。

The procedure used was the same as above except that the reaction mixture was sealed in an ampule under vacuum and placed in an oil bath at 1000C using maleic anhydride and EtMI as comonomers.

所采用的程序是一样的，除了上述反应混合物被密封在一安瓿真空条件下并放置在一油浴在1000c使用顺丁烯二酸酐和etmi作为comonomers 。

Asymmetric catalytic activity of chiral spiroborate esters,- or-1,1′-bi-2-naphthoxyboric acid-proline anhydride [-1 or-1], toward borane reduction of prochiral imine s has been ob- served.

手性螺硼酸酯-或-1，1'-联-2-萘酚硼酸--脯氨酸酐[-1或-1]对前手性亚胺硼烷还原的不对称催化活性被观察到。

On the basis of the Frontier Orbital Theory and three Bonding Principles, the possibility of reaction of active HOSA^- carbanion on polymerization process of MA by alkali catalyst and the mechanism of anionic polymerization of maleic anhydride were studied.

应用前线轨道理论和成键三原则研究了碱催化条件下马来酸酐均聚过程中α-羟基丁二酸酐碳阴离子活性中间体参与反应的可能性及其阴离子聚合机理。

The influence factors such as amount of catalyst,molar ratio of maleic anhydride to n-butanol,and reaction time on the yield of dibutyl maleate were discussed.

以La2(SO4)3/SiO2为催化剂，顺丁烯二酸酐和丁醇为原料，合成内增塑剂顺丁烯二酸二丁酯，探讨了催化剂用量，酐醇物质的量比以及反应时间等对收率的影响。

The Chemical method is based on the Diels-Alder reaction of conjugated dienes with maleic anhydride and the chromatographic analysis use a packed column with SE-30 as stationary phase.

建立了用共轭二烯烃与马来酸酐Diels-Alder特性反应和非极性固定液SE-30填充柱1m×1。

In this paper,the effect of stoichiometric ratio of anhydride/epoxide on thermal properties of curing products of epoxy resin was discussed.

研究了酸酐/环氧当量比 r对双酚A型E-44环氧树脂固化物耐热性能的影响。

The result showed that the degradation of polyitaconic anhydride in phosphate buffer solutions was the first-order reaction, and its degradation apparent constants were 0.0498, 0.0576 and 0. 1382h~(-1) in ph...

结果表明，聚衣康酸酐在磷酸缓冲溶液中的降解符合一级反应动力学规律，在pH值为5、7.4和8.8的缓释溶液中的表观速率常数分别为0.0498、0.0576和0.1382h~(-1)。

By the means of chemical modification, a series of reactive maleic anhydride terminated polyethylene glycols with different molecular weight have been synthesized.

合成了一系列含有反应活性端基的改性聚乙二醇，并对其结构与特性进行了表征和讨论。

The polyesters are obtained by the polymerization of maleic anhydride and polyethylene glycols.

多元酯被 maleic 醋酐和聚乙烯乙二醇的聚合获得。

There are different types of personal loans available.

有许多不同类型的个人贷款优惠。

The above mentioned teaching model of spiral rising can be used to avoid rigidness in teaching.

上述螺旋式上升的教学模式，可以避免教学形成模式後的僵化现象。