二聚

Main Products polyformaldehyde, ethylene dichloride, dichloroethane, acetic anhydride, etc. in the industry has a good reputation.

主营产品多聚甲醛、二氯乙烯、二氯乙烷、醋酸酐等在业界具有较好的声誉。

A series of UV-cured AB crosslinked polymers based on vinyl-terminated polyethylene adipate polyurethane and methyl methacrylate were prepared.

用紫外光聚合方法制备出一系列端乙烯基聚己二酸乙二醇酯聚氨酯和甲基丙烯酸甲酯AB交联聚合物。

For the synthesis of NHC precursors, there are also several routes: condensation of glyoxal, amines and paraformaldehyde; alkylation of imidazole or monosubstituted imidazole with alkyl halide; annulation of ortho esters and 1,2-diamines; ring closure of hydrazines or amides with acetic anhydride; reduction of thiones with Na/K in THF.

关于N-杂环卡宾前体的合成途径主要有：乙二醛、伯胺和多聚甲醛的缩合反应；卤代烷与咪唑及其取代咪唑的烷基化反应；原甲酸酯与1，2-二胺的成环反应；肼或酰胺与酸酐的环化反应；用Na/K对环硫脲化合物的还原反应。

On the contrary, sulfonated poly(arylene thioether phosphine oxide)s, with a IEC of 1.60 meq/g, even denote a swelling of 70.1% at 80oC and thus lose most of the mechanical strength.

而前述IEC为1.60 meq/g的磺化聚芳硫醚三苯基氧膦在80oC下的溶胀率为70.1%，已经出现溶胀突变，显著丧失力学强度，其耐溶胀性能比磺化聚二氮杂萘酮醚三苯基氧膦差得多。

The inhibition effect of 2,2,6,6-tetramethyl-4-hydroxylpiperidine-oxyl and some phenols and quinones on the AIBN initiated radical polymerization of styrene was studied by using dilatomitry method.

用膨胀计法，研究了2，2，6，6-四甲基-4-羟基哌啶氧自由基及一些醌、酚类化合物对偶氮二异丁腈引发的苯乙烯自由基聚合的阻聚效应。结果表明，当 St在80℃聚合时，加入TMHPO·或TMHPO·-BQ，阻聚效果较为显著。

Propose an algorithm for fast clustering polyhedra in 2-dimension. It adopts a feature tree to preserve clusters information.

提出针对二维空间多边形对象的快速聚类算法，采用特征树保存所有聚类信息。

It is converted to a series of polyamides and polyesters by means of low-temperature solution polycondensation and interfacial polycondensation.

以间二甲苯和多聚甲醛为原料合成了芳香性螺双内酯单体――5，5′-二甲酰氯-7，7′-二氧-2，2′-螺双，并通过常温溶液缩聚和界面缩聚合成了一系列聚酰胺和聚酯。

The formation of tin dioxide nanotubes on tin substrates anodizing in oxalic acid electrolytes and annealing in the air was investigated. Under optimized electrolyte, oxidation and anneal conditions, nanotubes of tin dioxide were fabricated.

单质锡箔片在草酸溶液中利用电化学阳极氧化合成出前聚体，并将前聚体通过加热氧化制备出具有纳米级孔道的二氧化锡材料。

The study investigats the mass transport and hydrolysis behavior for poly in various concentrations of methanol/ tin chloride (SnCl2·2H2O) cosolvent between 40℃ to 60℃. Furthermore, by using the successfully manufactured poly/ tin dioxide nano composites, the mechanical, optical and thermal properties are investigated.

中文摘要本研究系探讨在不同质传温度(40℃~60℃)下，聚甲基丙烯酸甲酯於不同浓度之氯化锡/甲醇潜溶剂(0g/100g、3g/100g、5g/100g、7g/100g及9g/100g)中的质传及水解行为，并利用成功制得之聚甲基丙烯酸甲酯/二氧化锡奈米复合材料，进一步探讨奈米复合材料之光学性质、机械性质及热性质。

According to the theory that the shape of seal rock control petroleum to migrate along with ridge, ray-tracing technique is adopted to forward hydrocarbon migration pathway. This technique advanced fluid potential by combining source sag and energy field.

东部凹陷中段为一常温常压盆地，运用流体势分析油气运聚意义不大，根据封闭面底部形态控制油气脊运移原理，本次研究采用射线追踪技术正演油气运聚路径，该技术基于油气二次运移的相对能量行为进行油气运移路径的三维分析，将生烃凹陷与能量场结合起来，是对流体势分析技术的重要改进。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。