酰亚胺

The preparation process of self-holing polyimide with organosilicon block includes the following steps: 1 the first reaction of polyacid anhydride in functionality not lower than 2, silicon oil with 2 or more amino or imino groups and polyamine with 2 or more amino groups, and the second reaction with one or several kinds of added isocyanate with 2 or more isocyanate radicals to produce sol of polyamido acid containing organosilicon block; 2 solidifying the sol to obtain solid polyamido acid containing organosilicon block; and 3 imidonating the solid to obtain self-holing polyimide with organosilicon block.

本发明公开了一种有机硅嵌段自发孔聚酰亚胺的制备方法，该方法包括以下步骤：(1)有机溶剂中具有大于或者等于2的酸酐官能团度的多酸酐与具有大于或者等于2的胺基或亚胺基的硅油以及具有大于或者等于2的胺基的多胺反应，随后添加一种或多种具有含有等于或者大于2个异氰酸酯基的异氰酸酯反应，生成含有机硅嵌段聚酰胺酸的溶胶。(2)溶胶固化制成有机硅嵌段聚酰胺酸固体。(3)固体亚胺化，即得有机硅嵌段自发孔聚酰亚胺。

A plausible process of this reaction is as following: Aldehyde was in equilibrium with the enol form, aldehyde reacted with aniline catalyzed by 2,2,2-trichloroacetic acid to afford imine, the generated imine immediately reacted with enol to form intermediate via intramolecular cyclization.

我们发现一分子芳基叠氮和一分子三苯基磷反应生成一分子磷亚胺，后者与由两分子取代的苯氧乙酰氯原位生成的烯酮反应生成4-亚烷基-β-烷基-内酰胺，其串联过程涉及烯酮亚胺的形成及其与烯酮的[2+2]的环加成反应。

Determining zineb fungicide using a flow-injection chemiluminescence method FANG Lu-qiu (Department of Environment and Chemistry, Fuling Normal University, Chongqing 408003, China) Abstract: N-bromosuccinimide was used to oxidize zineb under basic conditions, producing a strong chemiluminescence signal.

流动注射化学发光法测定杀菌剂代森锌的含量方卢秋(涪陵师范学院化学及环境科学系，重庆 408003)摘要：在碱性条件下，N-溴代丁二酰亚胺直接氧化代森锌产生强烈的化学发光信号，结合流动注射技术，建立了测定杀菌剂代森锌含量的流动注射化学发光分析法。

What's more, the fluorescence spectra of the products of DMPB with GSH and with Cys both redshifted from λ〓/λ〓=302/372nm to λ〓/λ〓=310/430nm with the different rate.

研究表明，DMPB荧光很弱，其结构中的两个马来酰亚胺基团都能与GSH或Cys发生反应，生成具有强荧光的产物。

Tris-(1-aziridinyl)- phosphine oxide and 2-[bis-(2-chloroethyl)-amino]-tetrahydro-1, 3, 2-oxazaphospholidine-2-oxide(Ⅲ, B-518) possess inhibitory action against a variety of animal tumours and have been used clinically. Recently, bis-(1-aziridinyl)-phosphinyl carbamic acid ethyl ester(Ⅱ, AB-100) was found to possess significant activity with low toxicity on experimental animal tumours.

双(2-氯乙基)氨基磷酰二氯与乙烯亚胺在脱水苯或对氧六环中并在三乙胺的存在下进行缩合，生成N，N-双(2-氯乙基)-N′，N-二乙烯基-磷酰胺；与双巯基或双氨基化合物作用，则生成相应的环状磷酰胺、磷酰胺酯以及磷酰胺硫代酯氮芥类化合物。

Onset decomposition temperature of the polyimide was at 508 ℃ under nitrogen atmosphere, and its glass-transition temperature was at 288 ℃. The polyimide film had strengths at break at 91 MPa, elongations to break of 10%～15%, and initial moduli at 1.7 GPa.

此外该聚醚酰亚胺还表现出良好的热性能和机械性能：玻璃化转变温度在288 ℃，氮气中起始分解温度在508 ℃；该聚合物薄膜的拉伸强度为91 MPa，断裂伸长率在10%～15%，起始模量为1.7 GPa。

In this work, methyl methacrylate, epoxy resin and unsaturated polyester resin were modified by industrial bismaleimides and liquid crystalline bismaleimides to increase the thermal stability and mechanical property of the three materials. So the ranges of the three materials useness will be enlarged.

本文采用双马来酰亚胺改性甲基丙烯酸甲酯、环氧树脂和不饱和聚酯树脂，以期提高这三种材料的耐热性能和机械性能，从而拓宽聚甲基丙烯酸甲酯、环氧树脂和不饱和聚酯树脂的应用范围，所以这一课题的研究具有重要的理论和实际意义。

Computer aided regression orthogonal design was used to optimize formulation of easy processable bismaleimide resin systems.

为获得具有良好加工性的双马来酰亚胺树脂体系，本文中运用二次回归正交设计方法安排实验，建立树脂组分配比与树脂性能之间的回归方程。

The results of IR and DSC indicated that the curing reaction of BMI-modified phenolic resin mainly consists of two steps: the allyl groups in the Novolak resin react with maleimide group via"Ene"addition, and addition reactions of the C=C bonds formed thereby are followed.

IR与DSC方法研究表明：BMI改性酚醛树脂的固化反应主要是Novolak树脂上的烯丙基首先与酰亚胺基团的烯加成反应，然后烯加成反应所形成的C=C双键发生进一步加成。

However, using tributylphosphine as a Lewis base and -1, 1'-bi-2-naphthol as a cocatalyst, the Baylis-Hillman reaction of arylaldehydes with cyclopent-1-en-one proceeded smoothly.

在本论文主要对磺酰亚胺和各种活化烯的aza-Baylis-Hillman反应以及它们的不对称aza-Baylis-Hillman反应进行了研究。

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。