酸酐

The reaction condition parameters of bulk and solution polymerization of maleic anhydride were selected by orthogonal experiment.

探讨了纳米粒子催化马来酸酐本体和溶液聚合，通过正交实验筛选出了最佳反应条件。

The graft polymerization of maleic a...

研究了马来酸酐在PE颗粒中的接枝反应，考察了反应条件对接枝率和酸值的影响。

The catalyst prepared by impregnation has good catalytic performance of maleic anhydride hydrogenation to succinic anhydride.

采用浸渍法制备的催化剂，具有较好的顺酐加氢制备琥珀酸酐活性。

Triethyl orthoformate, industry 97 37%; diethyl malonate, industry 98%; acetic anhydride, reagent 97%.

原甲酸三乙酯，工业97 37%；丙二酸二乙酯，工业98%；醋酸酐，试剂97%。

Grafted PHB was characterized by means of chemical titration and 〓C NMR, and the results proved that MA group was successfully grafted onto the methine carbon of PHB chains.

采用对酸酐基团进行化学滴定和〓C NMR方法对接枝产物的接枝率和结构进行了表征。

Methylol was led into the surface of carbon black and then graft esterificated with maleic anhydride using the feature that the hydrogen atoms onto the layer surface of carbon black were easily substituted.

为了改善导电炭黑与聚合物间的互容性，利用炭黑表面氢原子易被取代的特点，用甲醛在炭黑表面引入羟甲基，再与马来酸酐进行酯化接枝。

Methylol was led into the surface of carbon black and then graft esterificated with maleic anhydride using the feature that the hydrogen atoms onto the layer surface of carbon black were easily substituted.

摘 要：为了改善导电炭黑与聚合物间的互容性，利用炭黑表面氢原子易被取代的特点，用甲醛在炭黑表面引入羟甲基，再与马来酸酐进行酯化接枝。

In addition, the optical microphotography showed that the dispersion of methylolated MWCNTs in water was improved significantly. And then, the dispersion of the grafted MWCNTs in xylene was enhanced remarkably.

光学图像分析表明，经甲醛处理后的MWCNTs在水溶液中的分散性明显提高，而马来酸酐酯化接枝后的MWCNTs在二甲苯中的分散性明显增强。

The optimum conditions of reaction of each reaction:(1) The synthesis condition of PS with monocarboxylic acid terminated is that the mole ratio reatant of FeCl2·4H2O/chloroactic acid was 2.0, the reaction temperature 110℃, the reaction time

各步的最佳聚合反应条件：(1)mPEG与丁二酸酐反应最佳条件：溶剂为甲苯

Norbornene-2,3-dicarboxylic acid monomethyl ester was prepared by using 5-norbornene-2,3- anhydride and methanol as raw materials and toluene as solvent.

以5-降冰片烯-2，3-二酸酐和甲醇为原料，正交试验法合成了5-降冰片烯-2，3-二羧酸单甲酯，并对产物结构进行了表征。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。