二聚的

Cycloalkylation of diethyl malonate and ethyl cyanoacetate with alkyl halide was investigated in the presence of toluene.

以甲苯为溶剂及带水剂，用粉末K2CO3代替常规使用的乙醇钠，在季铵盐和聚乙二醇混合相转移催化剂的存在下，含有活泼氢的丙二酸二乙酯和氰乙酸乙酯与二卤代物进行缩合反应，得到相应的环化物。

The metalorganic complex NaEu4 is prepared by europium and Dibenzoyl Methane. The coordination polymers Eu-DBM-PAA and NaEu-DBM-PSAA are synthesized by the reaction of NaEu4 with polyacrylic acid M(subscript r=5000and copolymer of acrylic acid and styrene M(subscript r=3000.

研究了铕和二苯甲醯甲烷形成的有机配体NaEu4与聚丙烯酸M(下标 r=5000）、聚M(下标 r=3000发生配位反应分别得到配合物Eu-DBM-PAA和NaEu-DBM-PSAA，得率分别为89.7%和87.3%。

Application of conductive polyaniline on the electronic related industry has become more and more interesting and popular. In this research, the chemical oxidization method was used to form emeraldine salt type PANi doped with HNO3 and dodecyl benzene sulfonic acid.

导电性聚苯胺(Polyaniline；PANi)应用在电子相关产业是目前相当热门的研究领域，本研究采用化学氧化合成法制备硝酸与十二烷基苯磺酸共掺杂之Emeraldine Salt型聚苯胺。

Nonion surfactants 1dodecanol polyethylene oxider 23 (Brij-35), polyethylene glycol-6000 (PEG-6000) made nickel deposit became dentrite.

非离子表面活性剂月桂醇聚氧乙烯23醚Brij 35）、聚乙二醇-6000(PEG-6000使镀层由无添加剂时的粒晶变成了枝晶。

Linear and star-shaped hydroxy-terminated polys were synthesized by reacting L-lactide with co-initiators such as poly,hydroxyethyl methycrylate,trimethylolpropane,mannitol and sorbierite in the presence of stannous octoate as catalyst.

以辛酸亚锡为催化剂，分别以聚乙二醇、甲基丙烯酸羟乙酯、三羟甲基丙烷、季戊四醇、甘露醇和山梨醇等和L-丙交酯反应，得到末端为羟基的线形和星形聚L-丙交酯。

The synthesis method of the invention is as follows: first, 5-amino-2-(p-aminophenyl)- benzoxazole and aliphatic diacid are respectively recrystallized; NMP is distilled; solubilizer is dried; second, in an atmosphere of nitrogen, after Py and NMP are mixed evenly and added to a sealed reactor, the solubilizer is added into the reactor, followed by the 5-amino-2-(p-aminophenyl)- benzoxazole, then the mixture in the reactor is stirred; second, in an atmosphere of nitrogen, the mixture in the second step is stirred and heated to 50-150 DEG C, then the aliphatic diacid is added, followed by TPP for condensation; fourth, after methanol is poured into the reactor, the sediment is separated out from the mixture, filtered, washed and dried, so the semi-aromatic polyamide containing oxazole ring is obtained.

本发明的合成方法如下：一、分别重结晶5-氨基-2-苯并唑与脂肪族二酸；蒸馏NMP；干燥增溶剂；二、在氮气气氛下，Py与NMP混匀后加入密封的反应器中，再加入增溶剂，然后加入5-氨基-2-苯并唑，搅拌；三、在氮气气氛下，将步骤二的混合液搅拌并升温至50℃～150℃后加入脂肪族二酸，再加入TPP后缩聚；四、再倾入甲醇析出沉淀，过滤，清洗沉淀，再干燥；即得到含唑环半芳香聚酰胺。

With industrial monomer solution of dimethyldiallylammonium chloride as raw material, ammonium persulphate as initiator and Na_4EDTA as chelating agent,using the methods of adding initiator all at once,graduated increasing of temperature and stepwise initiation and polymerization,the polymerization process of preparing poly-dimethyldiallylammonium chloride was researched.

以一步法工业单体二甲基二烯丙基氯化铵为原料，以过硫酸铵为引发剂，采用一次性加入引发剂，梯度升温，分步引发水溶液聚合反应的方法，对制备聚二甲基二烯丙基氯化铵的聚合反应的工艺进行了优化研究。

In the presence of Pt catalyst, polyhydrodimethylsiloxane reacted with allyl polyoxyethylenepolyoxypropylene ether (F-6) by hydrosilylation to form an intermediate polyether silicone, which further undergo phosphation reaction with phosphorous pentoxide, a kind of phosphate modified polyethersiloxane surfactant was prepared.

采用铂作催化剂，通过含氢硅油和端烯基聚醚（F-6）的硅氢化加成反应先制得聚醚硅油中间体，再将其和五氧化二磷进行酯化反应，制得了一种磷酸酯型有机硅表面活性剂。

Tri-cyanurate as a excellent additional retardant was synthesized by using cyanuric chloride_3,tribromophenol as main materials and under the condition of sodium hydroxide,dichloromethane,toluene as solvent respectively.

以三聚氯氰3和三溴苯酚为主要原料，在碱性条件下，分别以二氯甲烷、甲苯作为溶剂，合成了一种性能优良的添加型阻燃剂三三聚氰酸酯。

Next, another novel diamine, 5-5-(4-phenyl-1,3,4-oxadiazol-2-ylbenzene-1,3-diamine, was prepared and polymerization was carried out in the same way to obtain polyimides containig triphenylamine units and 1,3,4-oxadiazole moieties in the side chain .

接下来，合成另一个新型双胺5-5-(4-phenyl-1，3，4-oxadiazol-2-ylbenzene-1，3-diamine后，以相同方法进聚缩合反应，可制得另一系列三苯胺和1，3，4-恶二唑为侧链的聚醯亚胺。

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。