查询词典 isocyanic acid

A salt or ester of isocyanic acid .

丁酸的三种同分异构甘油酯的任一种。

Isocyanic acid plays an important role in combustion and atmospheric chemistry. It is a potential agent for effectually eliminating nitrogen oxides in exhaust gas streams.

异氰酸在燃烧和大气化学中起着重要的作用，它可以从燃烧的废气中快速除去有毒的化合物。

Moreover, when changing the equivalence ratio of isocyanic acid ester and hydrogen class compound, solid's performances also change along with it.

并且，改变异氰酸酯和含活泼氢类化合物的当量比，因交联密度的不同，所得的固结体的性能也随之有所变化。

Keywords: methyl carbamate, isocyanic acid ester, polyurethane, green chemical technology, dimethyl carbonate

中文关键词：氨基甲酸甲酯；异氰酸酯；聚氨酯；绿色化工；碳酸二甲酯

The reaction path of isocyanic acid with carbon-hydrogen radicals CH, CH_2 and CH_3 have been investigated by using UMP2 method at 6-311 g level. The geometries of the stationary points and the changes of molecular structure along the reaction path are discussed.

在UMP2/6-311计算水平上，计算并讨论了碳氢自由基和异氰酸发生氢转移反应位能面上驻点的结构和分子结构变化，并依据 UMP2的优化构型，进一步采用UQCISD方法对反应途径上的驻点进行了单点能量计算。

When changing the flexible segment -- hydroxyl polyether's type and its molecular weight, and rigid segment -- aromatic isocyanic acid ester's type and function, solid's intensity, the heat resistance, the compressive strength and other performance will also vary.

改变氰凝预聚体结构中的柔性链段——端羟基聚醚的种类和分子量，或调节刚性链段——芳香族异氰酸酯的种类和官能度时，对固结体的强度、耐温性、抗压强度和其它性能可以进行控制。

This project quests for a new route for synthesizing polyurethane not only with mild reaction conditions but also without environmental pollution basing on the fact that virulent phosgene used in the industrial process to produce isocyanic acid ester has badly been polluting the environment at present. And this project belongs to the research in basic application science.

本项目基于目前工业生产异氰酸酯过程中采用剧毒光气对环境造成严重污染这一事实，探索出了一种反应条件温和、无环境污染的新的聚氨酯合成路线，属于应用基础研究。

This project mainly exploratorily studied that polyurethane was produced via condensation reaction between polyhydroxylated compounds and methyl carbamate, which was firstly synthesized by dimethyl carbonate and amines. The process is a green route because it turns away the synthesis and the utilization of toxical isocyanic acid ester.

本项目主要探索性地研究了碳酸二甲酯和胺类化合物反应生成氨基甲酸甲酯，然后氨基甲酸甲酯再和多羟基化合物直接反应得到聚氨酯材料，从而避免了异氰酸酯的合成和使用。

The prepared PU was an elastic solid,which could dissolved in ethanol,and it exhibited strong deep purple fluorescence at the peak of 365 nm along with a shoulder at 386 nm as a thin film. Obviously,the prepared PU also was a kind of uncommon ultraviolet-emitting polymer materials.2.A novel water-soluble rod-coil block copolymer was designed and prepared successfully via the facile isocyanic acid polycondensation method using polyfluorene as rod segment and polyethylene glycol as coil segment in the main chain for the first time.

所制备的聚氨酯是一种弹性固体，可以溶解在乙醇中，同时又显示出具有半导体性质的荧光性能——最大荧光发射峰在365 nm并且在386 nm处有一个小的侧肩峰，可见它又是一种非常难得的紫外发光聚合物材料。2、首次采用了简单的异氰酸酯反应，成功地将聚芴作为刚性链段和聚乙二醇作为柔性链段，以嵌段方式连结到聚合物分子主链上，从而形成了一种新型的具有刚性链—柔性链结构的嵌段共聚物。

Funds are needed. On the basis of local rich resources of raw material, the project adopts technology of straw smash and dustproof processing, emulsification of Isocyanic Acid Fat, accurately usage of agglutinant and viscidity-proof pattern. A production line of straw flakeboard with annual output of 100,000 cubic meters will be established.

拟引进资金，利用当地丰富的原料资源，采用麦秸细化精碎和防尘处理技术，异氰酸脂的乳化技术，精确施胶技术，防粘脱模技术，采用连续热压工艺设备，建设麦秸刨花板生产线，年产10万立方米麦秸刨花板。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。