乙烯的

The organic montmorillonite VC18-MMT was prepared by the exchanging inorganic cations with vinylbenzyldimethyloctadecylammionun chloride which could be co-polymerized with styrene.The predispersion of VC18-MMT was realized via sonicating the suspension of the montmorillonite particles in emulsifier solution,and then the styrene was added into the system and the in situ emulsion polymerization was carried out to prepare PS/VC18-MMT nanocomposites.

以可与苯乙烯发生共聚的阳离子表面活性剂乙烯苄基二甲基十八烷基氯化铵为插层处理剂改性蒙脱土（VC18-MMT），有机蒙脱土在超声波强剪切作用以及乳化剂作用下预分散在乳化剂溶液中，然后引入苯乙烯单体进行原位乳液聚合制备聚苯乙烯/蒙脱土纳米复合材料。

A series of ansa-metallocenes were synthesized. Their catalytic properties for the polymerization of ethylene and propene were studied.

4合成了一系列硅桥连双茂化合物，并分别研究了它们对乙烯和丙烯聚合的催化性能。

For the above purposes, using a tailored cyanometalate precursor,(1) Tp=hydrotris (pyrazolyl borate; Bu〓N〓=tetrabutylammonium cation , two trinulear complexes,〓(2),〓(3; cyclam: 1, 4, 8, 11-tetraazacyclotetradecane), two one-dimensional polymers,〓(4; dien: diethylenetriamine),〓(5), and a cluster 〓(6) have been synthesized and characterized structurally and magnetically.

基于上述研究热点，我们以修饰的氰基金属化合物(1)为构筑基元（Tp：三吡唑基氢硼烷，Bu〓N〓：四丁基铵离子），合成了两个杂三核化合物，〓(2)，〓（3；cyclam：1，4，8，11-四氮环十四烷），两个一维聚合物，〓（4；dien：二乙烯三胺），〓(5)，和一个十四核簇合物〓(6)。

Hydrophilic monomers pyrrolidone and acrylamide were grafted on polyurethane film surface by UV irradiation to improve the surface lubricity.

用紫外光直接引发亲水性单体 N-乙烯吡咯烷酮、丙烯酰胺在医用聚氨酯表面进行接枝反应，可以提高 PU表面的润滑性。

Divinylpyridine-9,9′-diethylfluorene nanoparticles were prepared by reprecipitation method.

利用二次沉淀法制备出不同粒径(101.6~516.9nm)的2，7-二乙烯吡啶基-9，9′-二乙基芴有机纳米微粒。

This induced resistance seems to be independent of salicylic acid, jasmonic acid and ethylene signalling.

这种诱导的抵抗性似乎和水杨酸，茉莉酸和乙烯信号转导无关。

Water-based resin approximately150, such as Rosin monomaleate monomaleate, styryl, acrylic copolymer resins, such as aminosulfonic ethylacrylate, emulsio, that is, there is a water-based dispersion resins, vinyl acetate copolymer, acrylic copolymer, polyurethane resin, epoxy resin, etc.

水性树脂的种类很多，如松香马来酸树脂、苯乙烯马来酸树脂、丙烯酸共聚物、氨基丙烯酸乙酯等，高分子乳液，即水性分散树脂，有醋酸乙烯共聚物、丙烯酸共聚物、聚氨酯树脂、环氧树脂等。

Poly（p-vinylbenzyl succinimide） resin,which can be abbreviated to succinimide resin,was prepared by the reaction of chloromethylated polystyrene with succinimide in the presence of base. The succinimide resin was characterized by diffuse reflectance infrared Fourier transform spectrometry and elemental analysis.

摘 要：在碱性条件下，氯甲基化聚苯乙烯与丁二酰亚胺反应合成了聚（对乙烯基苄基丁二酰亚胺）树脂，采用元素分析、红外光谱对合成树脂的组成进行了表征。

The copolymerizations of vinyl sulphone dyes with acrylonitile were carried out in the media of water and DMF, and in an emulsion system.

对乙烯砜型染料在较高浓度下与丙烯腈在沉淀、溶液、乳液等不同体系中的共聚反应进行了研究。

The telomerization reaction kinetics of 1,1,1,3-tetrachloropropane synthesis using tetrachloromethane and ethylene as raw materials was studied.

研究了以四氯化碳和乙烯为原料合成1，1，1，3-四氯丙烷的调聚反应动力学。

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。