乙烯基

Anilido-imino nickel complex 1 {(C6H3Me2-2,6)N=CH-5-NO2-C6H3N (C6H3Me2-2,6)}NiBr was first synthesized, and its catalytic behavior toward polymerizations of norbornene and ethylene in the presense of methylaluminoxane were investigated in detail. The complex activated with methylaluminoxane exhibited high activities for norbornene polymerization.

首次合成了苯胺基亚胺镍配合物1{(C6H3Me2-2，6)N=CH-5-NO2-C6H3N(C6H3Me2-2，6)}NiBr，研究了其在助催化剂甲基铝氧烷的作用下对降冰片烯、乙烯的均聚以及对降冰片烯和乙烯的共聚的催化性能。

This product and PVC and ethylene vinyl acetate copolymer has good histocompatibility, but also acrylic and poly methyl methacrylate, polyvinyl butyral, nitro cellulose, ethyl butyl acetate fibers and cellulose, such as miscibility.

本品与聚氯乙烯和乙烯醋酸乙烯共聚物有良好的相溶性，还和聚甲基丙稀酸甲酯、聚乙烯醇缩丁醛、硝基纤维素、醋酸丁酯纤维和乙基纤维素等相溶。

The result showed that, the effect of the synergistic reaction of alkyl-phenol-polyoxythylene ether phosphate dispersant TERSPERSE 4896, nonyl phenyl polyoxyethylene ether dispersant TERSPERSE 2210 and XG to suspension was different. Both the rheological curves were same presented as pseudoplastic fluid when they stored in R. T (18~25℃) for 10 days, but the rheological curve of suspension with the synergistic reaction of TERSPERSE 2210 and XG was changed to dilatant fluid when it stored in R.

结果表明，烷基酚聚氧乙烯磷酸酯类分散剂TERSPERSE 4896、壬基酚聚氧乙烯醚类分散剂TERSPERSE 2210与增粘剂黄原胶协同使用所得悬浮体系，室温(18~25℃)贮存10d仍表现出二者共同的流变特性，呈假塑性的流变曲线；但室温贮存150d后，含TERSPERSE 2210与黄原胶的悬浮体系的流变性质发生了明显变化，由假塑性流体向膨胀型流体转变。

The tool of Discover in the international popular software Materials Studio and the advanced COMPASS force field are adopted to simulate mechanical properties of PETN and PETN-based PBX at different temperatures, which is coated with four fluorine-containing polymers.

选择聚偏二氟乙烯、聚三氟氯乙烯、F2311和F2314作为粘结剂，对PETN及其与这4种含氟聚合物组成的PBX，用国际上流行的Materials Studio软件中的DISCOVER模块，以先进的COMPASS力场，主要模拟研究了PETN基PBX在不同温度下的力学性能。

OBJECTIVE: To observe the therapeutic efficacy of the new type of membrane plasma separator Evacure-4A prepared by ethylene vinyl alcohol copolymer on severe hepatitis patients, in addition, to compare the results versus that of PS-06 membrane plasma separator.

目的：观察由乙烯、乙烯醇共聚物制备的新型膜型血浆分离器Evacure-4A(EC-4A)治疗重型肝炎的临床疗效，并与由聚乙烯磺基制备的PS-06膜型血浆分离器进行对比分析。

The absorption characteristics and the structure at (0,0,1) plane of the 1,3,5-triamino-2,4,6-trinitrobenzene crystals of alternative copoly(vinylidene fluoride-chlorotrifluoroethylene) with various degree of polymerization has been studied by molecular dynamics simulations using compass forcefield and NVT ensemble model.

采用COMPASS力场和NVT正则系综的动力学模拟方法，搭建了聚合度分别为10， 50和100的偏氟乙烯/三氟氯乙烯交替共聚物，对交替共聚物在1，3，5-三氨基-2，4，6-三硝基苯的(0，0，1)晶面上的吸附和结构进行了分子动力学模拟。

The effect of zeolites ion-exchanged by transition metals on thermal catalytic cracking reaction is studied. The product distributions of the cracking reactions catalyzed by theβor ZSM-5 zeolites exchanged with transition metals are different from that catalyzed by corresponding Hzeolites, which means the mechanism of cracking reactions has varied. Group Ⅷ metals Fe, Co, Ni and Cu, Zn are shown to be of strong catalytic activity of oxidative dehydrogenation, while Ti and Cr are not of oxidative activity. Catalyzed by zeolites or catalyst containing Ag, conversion of thermal catalytic cracking reactions and the yield of ethylene increase while the yield of propylene does not decrease. Silver can not only promote the formation of carbonium ion, but also convert carbonium ion into free-radical via redox reaction. The weak adsorption of olefins on silver reduces the occurrence of hydrogen transfer and dehydrogenation. As a result, the yield of light olefins is favored by silver in the catalyst.

采用过渡金属交换的分子筛作为催化剂，进行催化热裂解制取乙烯的反应，研究发现，在β沸石分子筛和ZSM-5分子筛中引入过渡金属后，催化热裂解反应的产物分布与相应的氢型分子筛相比有了较大的变化，说明过渡金属的加入对于催化热裂解反应的机理具有影响，Ⅷ族金属如Fe、Co、Ni和第Ⅰ、Ⅱ副族Cu、Zn表现出较强的氧化脱氢活性，产物中氢气、焦炭的产率很高，Ti、Cr则未表现出氧化作用：分子筛及催化剂中引入银后，催化热裂解反应的转化率和乙烯的产率有了提高，丙烯产率没有很大的变化，说明银在催化热裂解反应中能够促进正碳离子的生成，又有可能通过氧化-还原作用部分改变反应机理，促进了自由基的生成，并且由于银对烯烃的吸附很弱，其氢转移反应和脱氢、加氢活性比较低，有利于烯烃产率的提高。

Dealcoholization temperature markedly influences the surface area and porosity of the resultant MAO-supports. When the support was pretreated at lower or higher temperature, the corresponding MAO-support shows very low surface area;2.XRD and IR analyses indicate that MAO has reacted with the residual ethanol in the supports, which is an important manner to get MAO fixed on the carrier. Morever, XPS analyse indicates that MAO can also be coordinated with MgCl_2, which is another way to get MAO fixed on the support;3.ICP and EDX analyses indicate that dealcoholization temperature not only determined the element content on the solid catalyst, but also influences the element distribution on the carrier;4.The activities of the supported phenoxy-imine catalysts and the properties of resultant polymers are strongly dependent on the dealcoholization temperature. The support (MSP-5) obtained by treating MgCl_2·2.56C_2H_5OH at 160℃for 4 h, then modified by MAO is very effective for immobilizing complex 3, the resultant solid catalyst (MSPC-5) shows very high activity in ethylene polymerization, and its kinetics of polymerization is stable during the reaction process. Finally, PEs with spherical morphology and high bulk density (over 0.35g/ml) were obtained, without reactor fouling;5.In this work, polymerization conditions such as alkylaluminums, Al/Zr ratio, temperature and H_2 had a pronounced effect on the activity of MSPC-5 and properties of PE;(3). New MgCl_2-Supported Single-Site Catalysts for Ethylene PolymerizationIn this work, a kind of new MgCl_2 support was obtained by anhydrous MgCl_2 co-milled with solid MAO, and it is a creative contribution. Then some single-site catalysts were supported on the new MgCl_2 support, and the resulted solid catalysts were tested in ethylene polymerization, the results indicated that:1.XRD and IR analyses indicate that MAO does be coordinated with MgCl_2, which is in good agreement with the results obtained by XPS;2.co-mlling time had no obvious effect on the texture of support after 12 hours;3.In this work, MgCl_2 was co-milled with solid MAO for different hours, and then complex 3 was supported on these co-milled supports. It was found that co-milling time markedly influences the activity of solid catalysts, but it had negligible effect on the kinetic profile and the properties of resultant PE.

XPS研究结果表明，MAO不仅仅只和乙醇作用，MAO还与MgCl_2本身有一定的作用，这是一个极为重要的发现；3、通过ICP和EDX表征，发现载体的脱醇温度直接影响着元素在固体催化剂中的含量及分布；4、脱醇温度极大地影响着负载苯氧基亚胺类催化剂的活性和聚合物的性能，特别是原始载体经160℃活化4小时制备得到的固体催化剂MSPC-5的活性明显高于其他脱醇温度条件下制得的固体催化，并且催化剂寿命长，表现出稳定的动力学行为，最终获得了高堆密度(大于0.35g／ml)的球形聚乙烯颗粒；5、本文选择MSPC-5为研究对象，考察了聚合反应参数对催化剂的活性及其聚合物的影响，研究发现：不同的烷基铝对催化剂具有非常重要的影响，特别足TIBA对MSPC-5的助催化活性最高，烷基铝的加入量有一个较佳值，聚合温度为80度时活性最高，H_2的加入使催化剂的活性明显降低且聚合物的分子量也减小；、新型氯化镁载体负载单活性中心催化剂催化乙烯聚合本文创造性采用固体MAO与无水氯化镁直接进行共研磨，制备出了一种的新型的氯化镁载体，并将该载体用于多种单活性中心催化剂的负载化研究，研究表明：1、通过BET、XRD的表征，再次证实了MAO与MgCl_2之间具有直接作用，与XPS的研究结果相一致；2、当研磨时间高于12小时时，延长研磨时间对载体的结构没有显著的影响；3、将配合物3负载于共研磨时间不同的一系列载体上，乙烯聚合结果表明，尽管共研磨时间对负载催化剂的活性具有明显的影响，但是它对聚合物的性能以及催化剂的影响不明显。

It is characterized in that: 2-( 5-(dimethylamino methyl- 2- furyl methyl sulpho ethylamine reacts with 1- methylthio - 1- methylamino- 2- nitro ethylene directly in water phase, crystallizing and separating out ranitidine alkali.

其特征在于：它是由2-(5-(二甲氨基甲基-2-呋喃基甲基硫代乙胺与1-甲硫基-1-甲胺基-2-硝基乙烯直接在水相中反应并结晶析出雷尼替丁碱。

This article reports a new kind of copolymer, non polar polar terpolymer : poly(styrene-butadiene-methyl methacrylate ) P(S-b-B-b-MMA prepared by anionic polymerization with n BuLi as initiator, 1,1 diphenylethylene as capping agent and lithium 2-(-methoxyethoxy) ethoxide as complex agent.

以正丁基锂为引发剂， 1 ，1-二苯基乙烯为戴帽剂， 2-(2-甲氧基乙氧基)乙氧基锂为络合剂，在环己烷、四氢呋喃混合溶剂中，采用阴离子聚合法，于－70℃～－40℃合成了非极性-极性的三嵌段共聚物聚苯乙烯-聚丁二烯-聚甲基丙烯酸甲酯，并借用GPC、1H-NMR、DSC、TEM、IR等仪器对共聚物进行了表征。

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。