二聚

In this paper,the monomers including St and BA with strong waterproof property were employed to modify the traditional PVAc emulsion,and meanwhile draw into DAAM functional monomer in the copolymer system,will prepare out cross linking copolymer emulsion for ADH to improve the waterproof,oilproof and dry/wet mechanical property of fuel oil filter paper.

采用具有较强抗水性的苯乙烯、丙烯酸丁酯等单体对传统聚醋酸乙烯酯乳液进行共聚改性，并在共聚体系中引入双丙酮丙烯酰胺功能单体，制备出可通过外加己二酸二酰肼交联的外交联醋丙共聚乳液，以期提高燃油滤纸的耐水、耐油性和干湿态的力学性能。

In addition, the invention further relates to a catalyzer combination used for polymerizing a conjugated dialkene monomer and the anions of an optional mono-vinyl aromatic hydrocarbon into a polydiene polymer having high and medium vinyl content. The catalyzer combination comprises an organolithium compound used as an anionic polymerization initiator, at least an alkali metal alkoxide compound expressed by the formula as a structure regulator.

此外，本发明还涉及一种用于将共轭二烯烃单体和任选的单乙烯基芳烃阴离子聚合成具有中高乙烯基含量的聚二烯聚合物的催化剂组合物，其包含作为阴离子聚合引发剂的有机锂化合物，和作为结构调节剂的至少一种式所示的碱金属醇盐化合物。

The consumer charges the polyethylene terephthalate container by pumping down on the overcap eight to 10 times, then removing it and holding down a conventional-looking aerosol button.

消费者收费的聚对苯二甲酸乙二醇酯容器抽下来的overcap 8至10倍，然后删除它，并举行了传统的外观气溶胶按钮。

To obtain a flocculant which could effectively remove dyes from dyeing wastewater , the amphoteric polymer was prepared by copolymerization of acrylamide, acrylic acid, cationic monomer and dmethyldiallylammonium chloride or acryloyl oxyethyl trimethyl ammonium chloride.

为制备一种对染色废水有显著脱色效果的絮凝剂，采用溶液聚合法，将两种阳离子单体二甲基二烯丙基氯化铵和丙烯酰氧乙基三甲基氯化铵分别与丙烯酰胺，丙烯酸共聚，合成了两性聚合物。

The properties of single chain and pauci chain polystyrene microspheres and recent results on the electron microscopy and selected area electron diffraction of single chain monocrystals of polyethylene oxide, isotactic polystyrene, cis1,4 polybutadiene and gutta percha are presented and discussed.

介绍和讨论了单链和寡链聚苯乙烯玻璃体微球的性质以及聚环氧乙烷、同立构聚苯乙烯、－，4－丁二稀、－，4－异戊二烯单链单晶电子显微镜和选区电子衍射观察的最新结果。

Keywords hyperbranched polymer;triphenylamine;bis（4-ethynylphenyl）phenylamine;1-octyne;[2+2+2] cyclotrimerization;dicarbonyl-cyclopentadienyl-cobalt catalyst;fluorescence quantum yields

超支化聚合物；三苯胺；二-（4-乙炔苯基）-苯胺； 1-辛炔； [2+2+2]环三聚；二羰基茂钴催化剂；荧光量子效率

Compounds were identified by means of physic-chemical property and spectral data including three new compounds: platyphyllin A (1), neochlorgeniclatone (2),(2E,6Z)-2,6-dimethyl-8-O-β-D-glucosyl-2,6-octadienoic acid (3). The known compounds included cyclic diarylheptanoids, phenylic acid, ect.

从白桦叶的水提取物中，利用各种色谱分离手段(硅胶柱色谱、聚酰胺柱色谱、凝胶柱色谱及制备薄层色谱等)，分离得到28个化合物，通过理化性质及各种波谱数据(NMR，MS，IR，etc)鉴定了23个化合物的结构，其中新化合物三个：platyphyllin A(1)，新绿原酸内酯(neochlorgeniclatone，2)，(2E，6Z)-2，6-二甲基-8-O--2，6-辛二烯酸(2E，6Z-2，6-dimethyl-8-O-β-D-glucosyl-2，6-octadienoic acid，3。

Synthesis experiments of butyl acetate were done with ammonium ferric hydrogen phos- phate as catalyzer.

以硫酸亚铁和磷酸二氢铵为原料，以聚乙二醇-400（PEG-400）为表面活性剂，经低热固相反应合成得到磷酸氢铁铵，经XRD分析表征证实了产物的分子式为（NH4）Fe（HPO4）2。

The result indicated that polychloride and anionic polyacrylamide could improve the retention of TiO_(2)-zeolite singnificantly.

考察了TiO2-沸石复合纸板制备中聚二甲基二烯丙基氯化铵/阴离子聚丙烯酰胺和阳离子淀粉/APAM二元助留体系助留效果。

PBO spinning solution was prepared from 4,6-diaminoresorcinol diphosphate in polyphosphoric acid by solution poly-condensation.

将稳定化后的单体和对苯二甲酸在PPA的介质中进行缩聚反应可以得到具有高聚合度（特性粘数=17dL／g）的聚亚苯基苯并二嗯唑。

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。