查询词典 polyethylene

This paper reviews the mechanism of the phase transfer catalytic reaction according to the different compositions of catalytists, including quaternary ammonium salts,polyethylene glycols and grown ethers as well as application of the PTC in Organic synthesis , such as the reaction of,nucleophilic substitution,addition,condensation,oxidation-reduction and so on.

综述了在不同催化剂结构下所遵循的相转移催化反应机理，包括季铵盐类、聚乙二醇类及冠醚类催化机理，以及相转移催化在有机合成中的应用，如亲核取代反应、加成反应、缩合反应、氧化还原反应

The gold chloride is extracted from acidic solution by polyethylene glycol-ammonium sulphate aqueous two-phase system .

利用聚乙二醇-硫酸铵[(NH4)2SO4]双水相体系从酸性溶液中萃取分离金。

The seven units at the complex include capacity for acetic acid, vinyl acetate monomer, acetic anhydride, vinyl acetate emulsions, Celstran long fiber-reinforced thermoplastic, GUR ultra-high molecular weight polyethylene and a polymer compounding unit.

该基地包含醋酸、醋酸乙烯单体、醋酐、醋酸乙烯-乙烯共聚乳液、超高分子量聚乙烯和长纤加强热塑性塑料的生产安装以及特种功效高技术复合材料安装。

The seven units at the complex include capacity for acetic acid, vinyl acetate monomer, acetic anhydride, vinyl acetate emulsions, Celstran long fiber-reinforced thermoplastic, GUR ultra-high molecular weight polyethylene and a polymer compounding unit.

该基地包含醋酸、醋酸乙烯单体、醋酐、醋酸乙烯-乙烯共聚乳液、超高分子量聚乙烯和长纤加强热塑性塑料的生产安装以及特种功效高技巧复合材料安装。

At present the company mainly engaged in natural fatty alcohol products (C8-10, C12-14, C16-18 and various pure distillate), fatty alcohol polyoxyethylene ether, the basic sub-nonyl polyoxyethylene ether, polyethylene glycol and penetrant series over 100 varieties and zinc powder Insurance Law, Insurance Law sodium powder, hair bleaching agent, carved white block , carved white zinc, zinc oxide, zinc borate, sulfur dioxide and so on.

目前公司主要经营产品有天然脂肪醇（C8-10、C12-14、C16-18及各种纯馏分）、脂肪醇聚氧乙烯醚（AEO、OS及平平加O）、壬基本分聚氧乙烯醚、聚乙二醇和渗透剂系列100多个品种和锌粉法保险粉、甲酸钠法保险粉、漂毛剂、雕白块、雕白锌、氧化锌、硼酸锌、二氧化硫等。

Thin film of tellurium was prepared by chemical vapour deposition on the polyethylene foils using room-temperature decomposition of electrochemically generated hydrogen telluride.

用化学气相沉积法制备碲薄膜，其步骤为：通过电化学方法制得碲化氢，碲化氢在室温下分解后在聚乙烯塑料箔上沉积得到碲薄膜。

Thin film of tellurium was prepared by chemical vapour deposition on the polyethylene foils using room-temperature decomposition of electrochemically generated hydrogen telluride.

摘 要：用化学气相沉积法制备碲薄膜，其步骤为：通过电化学方法制得碲化氢，碲化氢在室温下分解后在聚乙烯塑料箔上沉积得到碲薄膜。

Iron oxide Nanocrystalline Powders were prepared respectively by precipitation, stearic acid gel, polyethylene glycol gel, citrate gel and iron citrate combustion. The influence of synthesis method on the final product, such as the crystal structure, crystalline grain size, dispersivity were studied.

分别采用沉淀法、硬脂酸法、聚乙二醇法、柠檬酸法和柠檬酸铁快速燃烧法制备纳米氧化铁晶体，研究了这 5种制备方法对粉体晶型、平均粒径、磁性、分散性的影响。

The trace amount of impurities,namely C5,tert-butyl alcohol,di-secondary butyl ether,methyl ethyl ketone and secondary butyl alcohol,in C4 hydrocarbon from butylene hydration tail gas were analysed by means of gas chromatograph with a column packed with sebaconitrile and polyethylene glycol-20M,and liquid-phase admission valve.

2m×4mm为填充柱，采用液相进样阀液态直接进样的填充柱气相色谱法分析了丁烯水合尾气C4烃中的C5、叔丁醇、二仲丁醚、甲乙酮及仲丁醇等微量杂质的含量。

Polyethylene gas pipeline had many outstanding features, which successfully solved the two major traditional pipeline corrosion and joint leakage problems. But the lower mechanical strength was the main drawback, and minimum required strength was one of the key index to measure pipe performance of long-term use.

聚乙烯燃气管道具有的许多卓越特性，圆满地解决了传统管道的腐蚀和接头泄漏两大难题，但机械强度较低是其主要缺点，长期静液压强度是衡量PE管材长期使用性能的主要指标。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。