聚合

The results shown that 12-molybdophosphoric acid did play inhibition in radical reactions, and the mechanism was conformed as electron capture theory.

通过使用电子顺磁共振仪对苯乙烯自由基聚合体系中自由基的跟踪测试，进一步证实12-钼磷酸确实能够在自由基聚合体系中起到阻聚剂的作用，而且更加明确地提出其阻聚机理：通过捕获体系中的电子达到抑制自由基聚合反应的发生。

The preparation of polymer/montmorillonite intercalation composite materials has been studied by applying two kinds of photo polymerization reaction (photo acid generation and photo radical generation)in this work.

用小角X光衍射技术对产物内蒙脱土的结构进行表征，结果表明，蒙脱土经改性后能很好地使聚合单体及预聚物插入黏土层内并在光照下"就地"聚合生成光聚合复合材料。

This model was finely fitted by theexperimental results and was used to calculate the activation area,which was 0.127 〓/mol with little dependence of subphasetemperature. The positive activation area indicate that there is anincrease in area when the activated complex is formed, increasingthe surface pressure should decrease the rate constant and that theactivated complex is unimolecular in nature.

在一系列实验曲线的基础上，我们提出测量的面积变化应该由聚合中分子结构变化引起的急剧的瞬时面积变化与随后的与此面积变化相反的弛豫过程两部分组成，并据此提出一种反应动力学模型，此模型与实验结果相当吻合，此模型用于处理聚合速率的紫外光强依赖性，得到聚合速率常数近似与光强成二次幂指数关系；此模型也被用于计算活化面积，发现活化面积为〓，几乎与温度无关。

Our main products chloride, the crystallization of aluminum chloride, iron chloride, poly ferric sulfate and other products.

本厂主要生产聚合氯化铝、结晶三氯化铝、聚合氯化铝铁、聚合硫酸铁等产品。

The comonomer in the copolymer by cat247 is trend to isolated. A few amount of comonomer could make the melting point remarkably decreased and maintain the crystalline at a relative high level. This catalyst can be use to produce the material with low melting point and high intensity such as packing film with low hotsealing temperature. The copolymer by cat24 is characteristic of uniform comonomer distribution and low melting temperature and crystallinity. Therefore, this catalyst could be used to produce LLDPE and POE according the comonomer content; cat246 has a strong copolymerization ability, and the resultant polymer has relatively high blockiness. If this trend is strengthened by adjustment of polymerization condition, the polymer can be used as thermal plastic elastomer with random and crystalline blocks.

由于各个催化剂所产生的聚合物各具特点，所以其潜在的工业用途不同。cat247的产物中共单体趋于孤立分布，极少的共单体即可使熔点明显降低而结晶度仍保持较高水平，有利于制备低熔点、高强度的材料（如低热封温度的包装膜等）。cat24的催化聚合产物无规程度比较高，对降低熔点和结晶度都十分有效，通过控制产物中共单体含量的多少，可以生产LLDPE和POE；cat246共聚合能力强，且产物有嵌段倾向，通过调整聚合条件强化这一倾向后，可以用来生产具有无规-结晶嵌段结构的热塑性弹性体。

Based on summarizing and analyzing predecessor' works, by means of the principle for probability and statistics, the Cauchy distribution for converting rate of polymer micro core is proposed, and the expressions of ultimate converting rate and average molecule weight is derived in the process for establishing first-principle model of polyacrylonitrile.

以化工聚合反应过程为研究背景，在总结各类模型技术特点的基础上，针对聚合过程的复杂性、时变性、非线性和不确定性等性质，提出了一种通用的化工聚合反应过程多类型混联混合模型的建模方法。

More levels of nano-SiO〓 lead to larger particle size. An increase in polymerization reaction temperature causes the decrease in coagulum and increase in viscosity and particle size, and the nano-SiO〓 has same effects at certain temperature. When the levels of hydrophilic monomer acrylic acid and hydroxylethyl methacrylate in core composite are increased, the particle size of emulsifier-free emulsion decreases, in spite of the presence of nano-SiO〓.

无皂乳液具有单分散性好、表面洁净、成本低廉、不影响产品性能的特点，首次研究了含或不含纳米粒子的含羟基和羧基的丙烯酸无皂乳液聚合，发现含或不含纳米粒子的无皂乳液聚合后的粒子粒径较大，具有单分散性；较多的纳米粒子导致较大的乳液粒径；反应温度升高，凝聚物含量下降，而乳液粘度和乳胶粒粒径增加，在相同的反应温度下，纳米粒子降低了聚合过程中的凝聚物含量，增加了乳液聚合物的粘度和粒径；不论纳米粒子是否存在，当无皂乳液核组成中亲水单体AA和HEMA用量增加时，乳胶粒粒径均减少。

In this paper,the aqueous solution polymerization of acrylamide by using copper chloride/ethylene diamide/α chloroethyl benzene as an initiator was studied. Molecular weigh has a correlation of a straight line with the time.

原子转移自由基聚合是一种自由基"活性"聚合，自发现[1 ] 以来已应用该技术合成了一系列结构不同、性能各异的聚合物材料[2～ 3] ，并发展了多种ATRP引发体系，是活性聚合发展史上最简便的一种技术。

The pilot-trial technological recipe and process character of SB polymerization was emphatically analyzed. On the base of the considering of the industrialization of normal SB later product, the constant unit volume power was mainly selected as a rule to scale up the polymerization reactor during the industrialization of SB latex as cement additive.

着重分析了水泥专用丁苯胶乳的中试工艺配方和流程特点，在结合常规丁苯聚合工业放大规律的基础上，提出了采用以相同单位体积功为主的放大准则对水泥专用丁苯胶乳的聚合过程进行了工程放大试验，着重考察了搅拌转速、搅拌桨形式和内冷构件等因素对聚合过程稳定性和成品胶乳性能的影响，并分析讨论了20m3工业聚合釜的传热可行性问题。

The nuclei of eukaryotic cells contain three types of RNA polymerases: polymerase Ⅰ,Ⅱ and Ⅲ. They perform different functions in the cells.

真核生物的细胞核中具有三种不同的RNA聚合酶，分别是RNA聚合酶Ⅰ、RNA聚合酶Ⅱ和RNA聚合酶Ⅲ。

Objective To investigate the effects of interleukin-1 β converting enzyme gene on the biologic characteristics of ovarian cancer cells.

目的 探讨白细胞介素-1 β转换酶的表达，对卵巢癌细胞生物学特性的影响。

Campylobacter: This illness is the most commonly identified cause of diarrheal illness in the world.

弯曲：这种病是最常见的原因查明腹泻病，在世界上。