查询词典 butadiene

Three series of segmented polyurethanes were synthesized, which are based on 4,4'-methylene-di, N-methyl diethanolamine and hydroxy terminated poly-butadiene, poly or poly.

本文讨论了以聚环氧乙烷、聚环氧丙烷以及聚丁二烯为软段，以4，4'-二异氰酸二苯甲烷和N，N-二羟乙基甲胺为硬段的链段型聚氨酯的合成。

And the ethylene cracking furnaces are the primary equipments of the petrochemical industry, for example, about 65 percent of gross weight of the three olefins (ethylene, propylene and 1,3-butadiene) and the three aromatics (benzene, toluene and dimethylbenzene) is produced by the ethylene equipments.

乙烯绝大部分是由石油烷烃裂解而生产，乙烯裂解炉是乙烯生产中的关键设备，三烯和三苯总量的65%都来自乙烯生产装置。

In this thesis, the polymerization of triblock copolymer of styrene-butadiene-methyl methacrylate was carried out in glass flask ,with n-BuLi as initiator, 1,1-diphenylethylene as capping agent and Lithium 2(2-methoxyethoxy) ethoxide as additive.

本论文以n-BuLi为引发剂、1，1-二苯基乙烯为戴帽剂、2-(2-甲氧基乙氧基)乙氧基锂为添加剂，对玻璃聚合瓶中非极性-极性三嵌段共聚物聚苯乙烯—聚丁二烯—聚甲基丙烯酸甲酯的合成进行了研究。

This article reports a new kind of copolymer, non polar polar terpolymer : poly(styrene-butadiene-methyl methacrylate ) P(S-b-B-b-MMA prepared by anionic polymerization with n BuLi as initiator, 1,1 diphenylethylene as capping agent and lithium 2-(-methoxyethoxy) ethoxide as complex agent.

以正丁基锂为引发剂， 1 ，1-二苯基乙烯为戴帽剂， 2-(2-甲氧基乙氧基)乙氧基锂为络合剂，在环己烷、四氢呋喃混合溶剂中，采用阴离子聚合法，于－70℃～－40℃合成了非极性-极性的三嵌段共聚物聚苯乙烯-聚丁二烯-聚甲基丙烯酸甲酯，并借用GPC、1H-NMR、DSC、TEM、IR等仪器对共聚物进行了表征。

Montmorillonite/styrene–butadiene–styrene modified bitumen composites were prepared by melt blending with different contents of Sodium montmorillonite and organophilic montmorillonite.

因此，提高SBS改性沥青的耐老化性对于延长沥青路面的使用寿命具有重要的意义。

Hydrogenated poly (styrene-b-butadiene) copolymer/organophilic montmorillonite nanocomposites were prepared by a solution approach.

采用溶液混合方法制备了氢化苯乙烯／丁二烯三元嵌段共聚物／有机蒙脱土纳米复合材料。

Substituent effect of pyrazoles was also investigated by DNMR and DFT.We successfully synthesized these intermediates with exclusively-conformations in a mild condition. X-ray results show that substituents in the pyrazolyl ring affect greatly on the structures of products, especially theπdelocation of the fragment 1-metal-butadiene.

本文以取代吡唑和1-炔基Fischer卡宾化合物的Michael加成反应合成了12个-型β-吡唑基烯基卡宾化合物，反应条件温和。X-ray晶体衍射显示吡唑上取代基对产物结构，特别是1-M-丁二烯的共轭程度具有较大的影响。

The conditions of solution polymerization of butadiene with raffinate oil as solvent in nickel catalyst system were studied based on the researches of laboratory and industry.

采用镍催化体系，以抽余油为溶剂，研究了丁二烯溶液聚合的聚合条件。

In the process of extractive distillation o f butadiene,thequality of the byproduct butane-butene raffinate are rel ated to many process para meters, which are coupling and with noises.

丁二烯萃取精馏过程中，副产品抽余液的质量和很多工艺参数有关，工艺参数之间又是相互关联、耦合的，并具有噪声。

The effects of the blending ratio of polymers and the amounts of accelerator NA-22,reinforcing agent and softner on the properties of epichlorohydrin-ethylene oxide copolymer/nitrile butadiene rubber blend were studied.

研究了共聚型氯醚橡胶／丁腈橡胶共混比、促进剂NA－22用量、补强剂及软化剂对共混物性能的影响。

I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时，滚道或滚动元件褪色是很常见的特征。