查询词典 maleic acid

This article presents a laboratory synthetic method of the thermal polymerization of maleic acid and ammonia.

以马来酸为原料，合成了聚天冬氨酸，并用核磁共振、凝胶色谱等方法对其结构进行了分析，测定了重均分子量。

SCE. The peak height is directly proportional to the concentration of maleic acid over a range of 0.07～50μg/ml.

允许共存顺式与反式丁烯二酸的浓度比为1∶250.20次测量的相对标准偏差为1.1％。

Microwave-assisted ring-opening polymerization of ε-caprolactone was initiated by maleic acid in the absence of any metallic catalyst.

己内酷的微波开环聚合反应，制备了以PCL为基质的IBU释放体系，体外释放结果表明，其中的布洛芬可以持续而稳定地完全释放。

In order to improve the radiation resistance of PPC, the influence of γ-rays radiation on poly and poly were investigated, and radiation grafting reaction of maleic acid on PPC was explored.

中文摘要本文以提高二氧化碳－环氧化物共聚物的耐辐射性能为目的，研究了γ-射线辐射对聚碳酸丙烯酯和聚碳酸环己烯酯的结构与性能的影响，并采用辐射接枝或物理共混方法对PPC进行了改性研究。

By comparing the two analytical methods, it was found that RP-HPLC method had a wide linear range, and a high recovery, furthermore it was applicable to content determination of tolualdehyde and maleic acid.

通过对两种分析方法进行比较，发现反相高效液相色谱法不仅线性范围宽，回收率高，而且还能用于甲基苯甲醛和马来酸含量的测定。

It was synthesized by epoxidation of maleic acid with hydrogen peroxide,and the synthesis was carried out in an aqueous solution containing 75% volume of alcohol and over sodium tungstate dihydrate catalyst.

以Na2WO4.2H2O为催化剂，在体积分数为75%的乙醇中用H2O2氧化马来酸，进行了顺式环氧琥珀酸氢钠合成的实验。

The synthetic progress of polysuccinimide using maleic acid as original material was studied by two steps of aminization and polymerization. Changes of reactant and product composition in aminization reaction step was studied by using bromine value analysis method. It was found that amine salt and amide were main products in this step.

对以马来酐为原料合成聚琥珀酰亚胺的两个反应过程进行了研究，通过溴价测定法研究了胺化反应阶段反应物及产物各组分的变化情况，确定胺化反应阶段的产物组分主要是胺盐和酰胺。

Some other by-products, such as benzoquinone and maleic acid, were unsaturated and contain C＝C double bond which were prone to be attacked by ozone

另外一些中间产物，如马来酸和苯醌等属于不饱和有机物，含有较易被臭氧分子攻击的C＝C双键

Good thermal stability, High mechanical strength.Used as catalyst or catalyst carrier in the manufacturing of the important industrial products, such as cyanuramide, benzene anhydride, maleic acid anhydride, butadiene rubber, acrylic nitrite, etc.

用途：本产品在三聚氰胺、苯酐、顺丁烯二酸酐、顺丁橡胶、丙烯腈等重要工业品生产中用作催化剂及催化剂载体，也广泛用于石化产品的精制脱除芳烃，也可用于有机气体、液体的选择性吸附分离及离子交换脱除水中多价有害元素等。

It is found that the indirect electroreduction of maleic acid to butane diacid was achieved by Ti~/Ti~ redox system on the nanocrystalline TiO2 film surface, the electrode reaction mechanism is the called catalytic mechanism.

其中TiO_2/Ti_2O_3电对对马来酸具有异相电催化还原活性，纳米TiO_2膜中的Ti~/Ti~氧化还原电对作为媒质间接电还原马来酸为丁二酸，反应机理为电化学偶联随后化学催化反应机理。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐