查询词典 anhydrides

The reaction has been drawing increased attention in that the reaction permit the use of organoboron compounds that are thermally stable and inert to water and oxygen.In this section microwave promoted Suzuki reaction of Sodium tetraphenylborate (NaBPh4) with carboxylic anhydrides catalyzed by Pd(PPh3)2Cl2 in THF was first reported.

第二章：微波辐射下Pd配合物催化NaBPh_4与羧酸酐的偶联反应研究本章中我们在微波辐射条件下，研究了PdCl_2(PPh_3)_2催化NaBPh_4与羧酸酐偶联反应，合成出了十种不对称芳酮，并分别考察了微波辐射功率、辐射时间、溶剂和原料配比等因素对反应的影响，优选出了较佳的反应条件，并根据文献及实验结果，讨论了可能的反应机理。

The synthesis of target compound 6 was by mixture anhydrides method.

结论采用重复过量混合酸酐法合成了目标化合物（6），所用方法经济、有效、可靠。

Polyesters made from the reaction between bio-polyols and anhydrides are shown to be a good adhesive for making particleboard.

研究表明以多羟基化合物和多元酸形成的聚酯型胶粘剂适合于制造颗粒板。

A total of 143 acidic compounds were tentatively identified, including 10 acid anhydrides, 43 organic acids and 90 phenolic compounds.

同时对不同类别的化合物在二维气相色谱上的分布模式进行了研究。

The purpose of this work is to develop new methods for syntheses of polyimides derived from chlorophthalic anhydrides.

本工作的目的是以氯代苯酐和二胺为原料，制备双氯代酞酰亚胺单体，然后进行聚酰亚胺合成方法的研究，以达到减少合成步骤，降低其生产成本的目的，主要内容如下： 1由双氯代酞酰亚胺与双酚A在不同体系中进行聚合反应，发现双酚是否完全成盐和聚合体系含水量是决定聚合物分子量的关键因素。

ABSTRACT Studies on Methods for Syntheses of Polyimides from Chlorophthalic Anhydrides Polyimide is one of the most important thermal resistance polymers, which has been applied in many fields.

聚酰亚胺作为一类最重要的耐热高分子，具有广泛的应用领域。

This design is yearly produces 100,000 tons chromic anhydrides the synthesis crafts, uses in the sulfuric acid method the single pot process to carry on the production.

本设计是年产10万吨铬酸酐的合成工艺，采用硫酸法中的单罐法进行生产。

ABSTRACT Studies on Methods for Syntheses of Polyimides from Chlorophthalic Anhydrides Polyimide is one of the most important thermal resi...

聚酰亚胺作为一类最重要的耐热高分子，具有广泛的应用领域。

Aliphatic hyperbranched polyester ended with hydroxyl groups were modified by aromatic anhydrides and acid chloride with long aliphatic chain.

研究了改性后的两亲性分子在选择性溶剂中的相互作用和聚集行为； 3。

6 kinds of chitosan were reacted with succinic anhydrides.

华南理工大学轻工与食品学院，广州 510640

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。