乙烯的

The invention relates to a preparation method of vinylene carbonate, which comprises halogenated ethylene carbonate and dehydrohalogenation agent which are subject to contact reaction. The dehydrohalogenation agent is ammonia with a purity of not less than 99.9 percent.

一种碳酸亚乙烯酯的制备方法，该方法包括将一卤代碳酸乙烯酯与脱卤化氢剂进行接触反应，其中，所述脱卤化氢剂为纯度不低于99.9％的氨气。

The toughening effect of chlorinated polye thylene and nano-mete r fumed silica (SiO 2) on polyvinyl chlorid e was investigated by means of to ughness contribution rate, the mechanical properties of the composite were also studied.

传统增韧硬PVC的技术是在树脂中加入弹性体，如CPE、乙烯-醋酸乙烯酯共聚物、丁腈胶 [1] ；但增韧后PVC的性能往往出现一种或多种缺陷，如拉伸、弯曲强度下降和模量损失等，使增韧和增强成为一种矛盾体。

An improved method is provided for copolymerizing vinyl chloride with allyl glycidyl ether and a vinyl ester.

本发明提供将氯乙烯与烯丙基缩水甘油醚和乙烯酯共聚的改进的方法。

The catalyst combined with MAO or Al(i-Bu_3, AlEt_3 to form copolymerization active species, which was responsible for copolymerizing the ethylene andα-olefins to prepare branched polyethylene.

二酮锆/MAO Al(i-Bu_3、AlEt_3可以形成乙烯与α-烯烃的共聚活性中心，催化乙烯与特定链长的α-烯烃共聚得到了支化聚乙烯。

A gas sensor using PEDT thin film was fabricated with the assistance of interdigitated electrodes.

采用叉指电极结构研制出了3，4-乙烯二氧噻吩薄膜气体传感器，研究了3，4-乙烯二氧噻吩薄膜气体传感器对有毒气体NO2和NH3的敏感特性以及其自身的温度特性。

A kind of silica loaded cerium dioxide particles was prepared by the sol-gel method and the heat-resist performance of the silica loaded cerium dioxide particle added silicon rubber materials improved evidently as compared with that of the purely silica added materials.

研究了两种硅烷偶联剂——乙烯基三乙氧基硅烷(A-151)和乙烯基三特丁基过氧硅烷对高硬度硅橡胶性能的影响，比较发现A-151不但可以显著改善高硬度硅橡胶的回弹性，而且使用方便、成本较低。

Their technology and process is basically similar to that used ethylene, the raw material for the oxygen in the silver catalyst, caused by methane or nitrogen stabilizer, the existence of inhibitors of chloride, ethylene oxide directly generate ethylene oxide and ethylene B N and further to certain substances in water than in the tubular reactor for generating hydration ethylene glycol, ethylene glycol solution through evaporation to mention thick, dehydration, fractionation be ethylene glycol and other by-products.

它们的工艺技术和工艺流程基本上相似，即采用乙烯、氧气为原料，在银催化剂、甲烷或氮气致稳剂、氯化物抑制剂存在下，乙烯直接氧化生成环氧乙烷，环氧乙烷进一步与水以一定物质的量比在管式反应器内进行水合反应生成乙二醇，乙二醇溶液经蒸发提浓、脱水、分馏得到乙二醇及其他副产品。

The ethylene-vinyl acetate copolymer formulations containing nanoscale aluminum hydroxide as a flame retardant,organic montmorillonite and zinc borate as synergists were prepared by melt-blending.

采用熔融共混挤出法制备纳米氢氧化铝为主体的阻燃乙烯-醋酸乙烯共聚物材料，研究了阻燃增效剂纳米有机蒙脱土与硼酸锌对复合材料阻燃、力学与电学性能的影响。

A film-forming additive, vinyl ethylene sulfite with both vinylene group and sulfite group, affects the electrochemical performance of carbonaceous mesophase spherules and LiFePO4 electrode.

研究了具有不饱和双键和亚硫酸酯双官能团的乙烯基亚硫酸乙烯酯作为锂离子电池电解液成膜添加剂对中间相碳微球和LiFePO4电极电化学性能的影响。

Tris-(1-aziridinyl)- phosphine oxide and 2-[bis-(2-chloroethyl)-amino]-tetrahydro-1, 3, 2-oxazaphospholidine-2-oxide(Ⅲ, B-518) possess inhibitory action against a variety of animal tumours and have been used clinically. Recently, bis-(1-aziridinyl)-phosphinyl carbamic acid ethyl ester(Ⅱ, AB-100) was found to possess significant activity with low toxicity on experimental animal tumours.

双(2-氯乙基)氨基磷酰二氯与乙烯亚胺在脱水苯或对氧六环中并在三乙胺的存在下进行缩合，生成N，N-双(2-氯乙基)-N′，N-二乙烯基-磷酰胺；与双巯基或双氨基化合物作用，则生成相应的环状磷酰胺、磷酰胺酯以及磷酰胺硫代酯氮芥类化合物。

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。