戊烯

Attributed to the lubricant-effect of flexible LCPB,cold crystallization was observed in stereoblock PB.Bd-Ip block copolymersHTPB-b-PI,C-(PI-b-HTPBn,C-n,and PI-b-HTPB -b-PI and Bd-St block copolymersHTPB-b-PS,C-(PS-b-HTPBn,C-n, and PS-b-HTPB-b-PS containing crystallizable HTPB were well synthesized,the microstructures and properties of the copolymers were investigated in detail.

通过与异戊二烯或者苯乙烯共聚，合成了含高反式聚丁二烯的丁二烯-异戊二烯嵌段共聚物包括HTPB-b-PI，C-(PI-b-HTPBn，C-n和PI-b-HTPB-b-PI和丁二烯-苯乙烯嵌段共聚物包括HTPB-b-PS，C-(PS-b-HTPBn，C-n和PS-b-HTPB-b-PS，对嵌段共聚物的结构和性能进行了系统的研究。

Attributed to the lubricant-effect of flexible LCPB,cold crystallization was observed in stereoblock PB.Bd-Ip block copolymersHTPB-b-PI,C-(PI-b-HTPBn,C-n,and PI-b-HTPB -b-PI and Bd-St block copolymersHTPB-b-PS,C-(PS-b-HTPBn,C-n, and PS-b-HTPB-b-PS containing crystallizable HTPB were well synthesized,the microstructures and properties of the copolymers were investigated in detail.

加热器通过与异戊二烯或者苯乙烯共聚，合成了含高反式聚丁二烯的丁二烯-异戊二烯嵌段共聚物包括HTPB-b-PI，C-(PI-b-HTPBn，C-n和PI-b-HTPB-b-PI和丁二烯-苯乙烯嵌段共聚物包括HTPB-b-PS，C-(PS-b-HTPBn，C-n和PS-b-HTPB-b-PS，对嵌段共聚物的结构和性能进行了系统的研究。

To establish a method for determination of cyclopentadiene,dimethylformamide and N-methylpyrrolidone simultaneously in isoprene by GC.

用毛细色谱法建立异戊二烯中各组分定性分析方法及环戊二烯，N-甲基吡咯烷酮，N，N-二甲基甲酰胺的测定方法。

The catalytic performance of a series of supported KNO3 solid bases for the synthesis of methylcyclopentadiene via cyclopentadiene methylation with methanol was investigated.

考察了负载型KNO3固体碱对环戊二烯和甲醇的甲基化制备甲基环戊二烯反应的催化性能。

Di-cyclopentadiene deserves to be mentioned for its simple decomposed product,cyclopentadiene,and its low-price.

尤其是双环戊二烯的分解产物单纯，仅有解聚后的环戊二烯一种，且价廉、易得，值得重视。

Third, quality assurance advantage of the present-Cyclopentadiene most dependent on imports, high prices, limited number of domestic manufacturers of quality products extremely unstable, and cyclopentadiene in the country is already mature product, the source wide quality Reliable.

甲基环戊二烯目前大部分依赖于进口，价格高、数量有限，国内生产厂家的产品质量极不稳定，而环戊二烯在国内已是成熟产品，来源广、质量可靠。

The results of catalytic activity show that both Ni-B and Ni-P sample have the same kinetic equation for hydrogenation of 1, 3-cyclopentadiene to cyclopentene and the same TOF. Therefore, it can be suggested that they have the similar active site. The catalytic activity of Ni-B sample is higher than that of Ni-P sample, and it is due to the more active sites of Ni-B sample having.

催化活性测试表明，Ni-B与Ni-P催化环戊二烯加氢反应对环戊二烯具有相同的动力学方程，而且两者具有相似的氢转换频率，表明两者的活性中心本质上是相似的，类金属不同导致的电子转移方向的不同仅仅影响反应的初活性，宏观活性的差别在于两者活性中心数量的不同。

A new technology to synthetize trans-1,4-polyisoprene with bulk precipitation polymerization in the presence of supported Titanium catalysts was introduced, and the technogical process , its economical and qualty index were discussed.

简要介绍了采用负载钛体系催化异戊二烯本体沉淀聚合法合成高反式-1，4-聚异戊二烯的新技术、工艺流程和技术经济指标。

A similar reaction of the sulfur analog gave only the product of tetramethylene bridged bisdititanium halides.

在企图合成硫桥环戊二烯基化合物时，得到的却是四亚甲基桥联双环戊二烯基金属衍生物。

Advances in Research on Plants Reactions under Phosphate Starvation;2. Topics discussed in this article includes synthesis and structures of R2M24, the reactions of its metal-metal triple bond with various reagents such as nucleophiles, carbon-carbon mu.

本文对一类重要的ⅥB族金属叁键化合物R_2M_2_4(R为环戊二烯基及类环戊二烯基)近年来的研究成果进行了综述，综述重点是这类化合物的官能团M≡M参键的化学活性，全文包括R_2M_2_4的合成及结构，M≡M叁键与亲核试剂、与碳-碳重键，与氧或与金属羰基物等试剂的反应及其应用。

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。