查询词典 styrene

Styrene-dimethylsiloxane block copolymers with types of andn were, synthesized under the existence of catalyst, lithium naphthalene, and couplins asent, stannous octoate or olisomer of dichlorodimethysiloxane.

本文用萘锂作为催化剂，辛酸亚锡或二氯二甲基硅氧烷的低聚物为扩链剂，设计和合成了分子量为6～13万苯乙烯与二甲基硅氧烷的結构单元数之比为1.0～9.1的嵌段共聚物和_n。

Based on the principle of Hunter reagant,N-Hydroxysuccinimide functional group was introduced into polymer carrier to synthesize a couple of olefine acids" and styrene" copolymer-NHS-esters.

利用Hunter试剂的原理，将N-羟基琥珀酰亚胺酯功能基团引入高分子载体上，合成了几种烯酸与苯乙烯聚合物的NHS酯。

Hydrogenated poly (styrene-b-butadiene) copolymer/organophilic montmorillonite nanocomposites were prepared by a solution approach.

采用溶液混合方法制备了氢化苯乙烯／丁二烯三元嵌段共聚物／有机蒙脱土纳米复合材料。

In solid phase process, the polyiodides, which include triiodide, pentaiodide, heptaiodide, nonaiodide and undecaiodide tetra-n-butyl ammonium iodide, tetrabutyl ammonium bromide and tetramethyl ammonium iodide poly-compounds, were synthesized by the low-heat solid phase reaction between iodine and tetra-n-butyl ammonium iodide, tetrabutyl ammonium bromide or tetramethyl ammonium iodide; In complexation process, solution polyiodides were synthesized by complexing action of different agents; In resinifying process, triiodide, pentaiodide, heptaiodide resinic polyiodides were synthesized by ion-exchange when the strong basicity styrene anion exchange resin, potassium iodide and iodine were used as raw materials.

固相法是用正四丁基碘化铵、四丁基溴化铵或四甲基碘化铵分别与碘作用，通过低热固相反应，合成出碘三、碘五、碘七、碘九和碘十一形式的正四丁基碘化铵、四丁基溴化铵或四甲基碘化铵的系列高聚碘化合物；在络合法合成溶液高聚碘的实验中，选用几种络合剂通过络合作用首次合成了溶液高聚碘；树脂法合成高聚碘的实验是采用强碱性苯乙烯系阴离子交换树脂、碘化钾和碘为原料，通过离子交换，合成了碘三、碘五和碘七形式的树脂高聚碘。

Catalytical Oxidation of Styrene by Molecularly Imprinted Polymer with Phenylacetic Acid as Template and Hemin as co-monomer Jun Wang;Zhi-Yong Chen;Mei-Ping Zhao;Yuan-Zong Li

一种自适应多亲遗传算法及其性能分析吴佳英；李平；郑金华·网格技术在数字图书馆发展的应用姜丽华；杨晓蓉·基于B/S结构的实验室管理信息系统设计与实现王红林；何都良；郑有飞；孙彩云

In this paper, twenty novel meso-substituted porphyrins of four series were designed and synthesized by increasing the conjugation of porphyrins or introducing substituents with high fluorescence quantum yield into the meso-position of porphine, and then red OLEDs were fabricated by doping porphyrins into a suitable host using ten porphyrins compounds and their electrolumin -escence properties were tested. The main contents and results were generalized as follows:Three meso-tetrakisporphyrins 4a-c and three conjugations of porphine-triarylamine linked by styrene 10a-c were synthesized and characterized by 1H NMR, MS, UV-vis spectra and fluorescence emission spectra.

本文通过增大卟啉分子的共轭结构或将具有高荧光量子产率的基团连接到卟吩环的中位得到了四类共20个新型的卟啉化合物，并选取其中10个化合物制备有机发光器件来考察材料的电致发光性能，具体内容包括以下几个部分：设计合成了3个中位直接被三芳胺取代的卟啉化合物4a-c和3个通过苯乙烯连接的卟吩-三芳胺共轭体10a-c，通过核磁氢谱、质谱、紫外吸收光谱和荧光发射光谱表征了新化合物的结构。

The resin has double effects including absorption and ion exchange; and it simultaneously has hydrophilic basic pyranyl functional groups and hydrophobic styrene frames and has good affinity to amphoteric bioreagents such as the protein.

该树脂具有吸附与离子交换的双重作用。

Initially, we studied the ring opening of various epoxides such as styrene oxide, propylene oxide, epichlorohydrin and cyclohexene oxide with pyrazole and excellent results were obtained.

最初，我们研究了开环的各种氧化物，如环氧苯乙烷，环氧丙烷，环氧氯丙烷和环氧环己烷与吡唑和优异的成绩获得。

Standard enthalpy changes of the initial pyrolysis process of ethylbenzene were computed by five methods (UAM1, UHF/3-21G*, UB3LYP/3-21G* and UB3LYP/6-31G*). UB3LYP/6-31G* due to its accuracy compared to the experimental values was chosen to calculate the thermodynamic and kinetic parameters of the process at different temperature ranges (298 ~ 1573 K). The computation results showed that ethylbenzene began to pyrolyze at 973 K and the main product was styrene.

对乙苯的初期热裂解过程，用三种方法结合两种基组(UAM1、UHF/3-21G~*、UB3LYP/3-21G~*和UB3LYP/6-31G~*)计算了标准反应焓变，经与实验值进行对比，筛选出计算结果精确的UB3LYP/6-31G~*方法，并以此获得了乙苯初期热裂解过程在298～1573 K范围内的热、动力学参数。

Especially , the rearrangement reaction of converting styrene oxide to phenylacetyldehyde were investigated. In this paper, we also studied the method of preparing SO42-/TiO2 by vitriolic titanium boiling regurgitant hydrolyzation and applications of SO42-/TiO2 in the preparation of iso-amyl acetate.

对环氧苯乙烷经分子重排反应制备苯乙醛进行了深入研究；本论文还用硫酸钛沸腾回流水解法制备了纳米SO_4~(2-)/TiO_2固体超强酸粉末，并应用于冰乙酸与异戊醇酯化合成乙酸异戊酯的反应。

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。