查询词典 monomer

It showed that the blend system had much slower Rp than that of hybrid monomer, either of acrylate double bond or propenyl ether double bond, and propenyl ether double bond conversion of hybrid monomer was much higher than that of the blend system at the end.

杂化单体与相同类型的混合体系相比，每种基团的反应动力学性质都得到了促进，丙烯酸酯和丙烯基醚双键的聚合速率都有了很大提高，丙烯基醚双键的转化率较混合体系有很大增加。

The excited-state intramolecular proton transfer tautomerism reaction of 6-methyl-4-hydroxy pyri-midine monomers and dimmers was investigated by the ab initio method with the self-consistent reaction field with Tomas's polarized continuum mode and CIS theories at HF level on the basis of 6-311+G* and 6-31G basis set. By studying the potential energy surface, it was found that the monomer's ground-state proton transfer process together with the excited-state proton transfer process is a molecular system of four energy level, but dimmers were not, which can be used to explain the fact that UV-visible absorption and fluorescence spectra of monomer and dimers all corresponded to quinoid.

采用 ab initio HF理论的组态相关CIS方法和连续溶剂模型PCM，分别在6-311+G*和6-31G水平上研究了6-甲基-4-羟基嘧啶单体及二聚体激发态质子转移的异构化反应；对其反应势能面的研究发现，单体基态和激发态的异构化反应一起可以形成四能级的分子电子体系，而二聚体的却不能，由此解释了单体和二聚体的紫外吸收光谱和荧光发射光谱均对应于酮式构型的原因。

The phase behavior of monomer and network polymers was investigated by DSC, POM, and X-ray measurement. The monomer exhibits typical nematic threaded and schlieren texture.

合成的液晶单体及聚合物的化学结构均通过红外的表徵，利用DSC、POM和X射线衍射技术研究了其相行为。

The main contents are as follows:(1) The acrylic adhesive was synthesized by the method of semicontinuous emulsion polymerization. The effect of the weight ratio of monomer, type and quantity of functional monomer, the amount of emulsifier, reaction time and temperature on the properties of adhesive was discussed. And the molecular structure of the acrylate adhesive was characterized by FT-IR. Finally, the better production process of acrylic adhesive was determined.

具体内容如下： 1、采用半连续种子聚合的方法合成丙烯酸酯型胶粘剂，探讨了合成胶粘剂的软硬单体的配比、功能性单体的种类、用量及工艺条件(乳化剂的用量、反应时间和温度)对胶粘剂各项性能的影响，通过红外光谱对胶粘剂的微观结构进行表征，并最终确定较好的工艺配方。

By azo compound became chromophore monomer disperse red -19, and through Sulfonyl of the compound was synthesized by the C, and through 1HNMR its structure was characterized, the results show that the synthesis of compounds C of very high purity, synthetic polymers can meet at the request of the monomer, but also of the compound D, through 1HNMR its characterization, showed that high purity compounds D, is expected to be functional after the adoption of To all the excellent performance PEEK electro-optic polymer materials.

本文通过偶氮化合成了生色团单体分散红-19，并通过磺酰化反应合成得到了化合物C，并通过核磁共振氢谱对其结构进行了表征，结果表明，所合成的化合物C的纯度非常高，完全能满足聚合物合成时对单体的要求，同时也合成了化合物D，通过核磁共振氢谱对其结构表征，显示化合物D纯度很高，应有望通过后功能化合成出各种性能优良的聚醚醚酮电光高分子材料。

The present invention relates to a thermoplastic interpolymer product comprising an alpha -olefin interpolymerized with at least one vinyl or vinylidene aromatic monomer and/or at least one hindered aliphatic or cycloaliphatic vinyl or vinylidene aromatic monomer and, in at least one aspect, is characterized as having substantially synergistic thermal properties.

本发明涉及一种包含与至少一种乙烯基或亚乙烯基的芳族单体和/或至少一种受阻的脂族或环脂族的乙烯基或亚乙烯基芳族单体共聚的α－烯烃热塑性共聚体产物，及至少一方面，其特征为具有实质协同热性质。

In this paper the emulsion of polyacrylamide was synthesized in the polyglycol solutions, acryl amide and acrylic acid sodium was used as the monomer. In more detail, we investigated the effect of the concentration of the monomers, the ratio of monomer and PEG, the ratio of monomers, temperature, and emulsifier on the stability of the HPAM emulsion and the molecular weight of the HPAM.

为了提高聚丙烯酰胺相对分子质量，以丙烯酰胺与丙烯酸钠为原料，在聚乙二醇水溶液中合成了聚丙烯酰胺水包水乳液，考察了初始单体质量分数、共聚单体与聚乙二醇摩尔比、共聚单体摩尔比、聚合反应温度、乳化剂种类及其浓度对HPAM水包水乳液稳定性及相对分子质量的影响，所得共聚产物相对分子质量可达1.5×10^7。

An acrylic resin was synthesized by the radical copolymerization with methyl methacrylate, butyl acrylate and methacrylic acid monomers in solution using benzoperoxide as initiator. Appropriate parameters of monomer ratio, monomer concentration, solvent, and reaction temperature were found by experiment.

以过氧化二苯甲酰为引发剂，采用溶液聚合合成了甲基丙烯酸甲酯-丙烯酸丁酯-甲基丙烯酸树脂，通过实验确定了自由基共聚合适宜的单体配比、单体浓度、引发剂浓度、溶剂以及反应的升温速度。

Their specific optical rotation is higher than 1, 1'-binaphthyl monomer in concentrated sulfuric acid, and increased with the excess enantiomer percentage of monomers increased, but the direction of rotation is not same with their monomer.

它们的结晶度较低，在浓硫酸中的旋光活性远大于联萘单体，其旋光值与聚合物手性单元的过量比例成线性关系，但旋光方向却与单体不同。

With increasing monomer concentration inside the disperse phase, the monodispersity of emulsions became slightly worse and the mean diameter of emulsions gradually became smaller. Monodisperse monomer-containing emulsions were obtained when the SPG membrane pore size was larger than 1.0 μm; however, when the SPG membrane pore size was smaller than 1.0 μm, no monodisperse emulsions were obtained because of the formation and chokage of p-phthalic acid crystals in the pores of the SPG membrane.

当SPG膜孔径大于1.0 μm左右时，可得到单分散的含TDC单体乳液；而当孔径小于1.0 μm左右时，水分子更容易扩散并溶解到油水界面甚至油相内部与TDC生成对苯二甲酸，TPA积累到一定程度在油水界面上析出将膜孔堵塞，从而无法制得单分散乳液。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新