1) ethylene tetramerization
乙烯四聚
1.
According to the mechanisms of ethylene tetramerization, we have studied nine cocatalysts and seven donors in PNP/Cr(Ⅲ)/cocatalyst .
在本课题的研究中,基于乙烯四聚反应机理,考察了9种助催化剂(包括5种烷基铝助催化剂和4种烷基铝氧烷助催化剂)和7种促进剂在PNP/Cr(Ⅲ)/助催化剂和/或促进剂乙烯四聚催化体系中所起的作用,主要是研究其对1-辛烯选择性和催化剂活性的影响,得到了一系列有价值的结果和结论。
2.
So it is very important to study the catalysts of ethylene tetramerization.
所以,对乙烯四聚催化体系的研究具有重大的现实意义。
3.
According to the mechanisms of ethylene tetramerization, ten ligands were designed、synthesized in this study.
本研究基于乙烯四聚反应机理进行了催化剂的设计,共合成了10个配体,考察了配体在催化体系中的作用,并对其中4个配体重点考察了配体结构、反应温度、Al/Cr摩尔比、PNP/Cr摩尔比对1-辛烯选择性和催化剂活性的影响,确定了适宜的工艺条件。
2) PTFE
聚四氟乙烯
1.
Fabrication and Wear Property of Electroless Co-P-PTFE Composite Coatings;
钴、磷、聚四氟乙烯复合镀层性能研究
2.
DAMAGE ANALYSES OF PTFE LINING IN CRUDE DISTILLATION COLUMN;
粗馏塔釜聚四氟乙烯衬里的破坏分析
3.
Analysis of Causes Leading to Destruction of PTFE lining in Coarse Fractionating Tower;
粗馏塔聚四氟乙烯衬里的破坏分析
3) teflon
[英]['teflɔn] [美]['tɛf'lɑn]
聚四氟乙烯
1.
Build-up spiral pipe condenser made of glass lining and teflon;
搪玻璃聚四氟乙烯组合盘管冷凝器
2.
The serviceability and development of teflon used as lubricant additive;
聚四氟乙烯润滑添加剂的使用性能与发展
3.
This paper analyzes the main causes of corrosion on boilers' gas pipelines,puts forth the measure of teflon-steel coated thermoplastic inner-cased pipe,which was implemented.
分析了造成锅炉煤气管道系统腐蚀的主要原因,提出并实施了采用聚四氟乙烯钢覆热滚塑内衬管道的解决办法。
4) polytetrafluoroethylene
[英][,pɔli,tetrə,fluərə'eθili:n] [美][,pɑli,tɛtrə,flʊro'ɛθə,lin, -,flɔr-, -,flor-]
聚四氟乙烯
1.
Effects of Fillers on the Tribological Properties of Polytetrafluoroethylene Based Composites;
填充材料对聚四氟乙烯基复合材料摩擦学特性的影响
2.
Main Moulding Products of Polytetrafluoroethylene and Their Processing Technology;
聚四氟乙烯主要成型制品及生产工艺
3.
Preparation of stretching porous polytetrafluoroethylene membrane;
聚四氟乙烯拉伸微孔膜的制备
5) poly(tetrafluoroethylene)
聚四氟乙烯
1.
In this paper,the surface modification ways of poly(tetrafluoroethylene) were introduced.
本文介绍了各种聚四氟乙烯ＰＴＥＥ膜的处理方法，以及国外近几年来采用的新方法。
2.
Polyvinylidene fluoride (PVDF) and poly(tetrafluoroethylene) (PTFE) possess excellent chemical stability and mechanical properties, they has good resistant to heat, cold, radiation and chemical corrosion and widely used as excellent membrane materials in industry for a long time, but they both have strong hydrophobicity which can cause the pollution of the membranes.
聚偏氟乙烯(PVDF)和聚四氟乙烯(PTFE)材料具有优良的化学稳定性和机械性能,能耐热、耐寒、耐辐射和耐化学腐蚀,长期以来作为优良的膜材料广泛应用于工业生产当中,但二者均有极强的疏水性,应用过程中容易造成污染,造成水通量和分离效率下降,要制备pH值敏感型微孔膜需要对其进行改性,提高其亲水性。
6) polytetrafluoroethylene(PTFE)
聚四氟乙烯
1.
By codepositing metal nickel and polytetrafluoroethylene(PTFE)particles,composite coatings with low coefficient of friction,nonstick characteristics,and selflubrication were prepared.
采用复合电沉积的方法制得的镍聚四氟乙烯复合膜具有优良的减摩性和自润滑性。
2.
The pyrolysis characteristics of polytetrafluoroethylene(PTFE) were studied in the atmosphere of nitrogen by thermogravimetric analysis.
采用热重分析法,研究了聚四氟乙烯(PTFE)在氮气气氛下的热裂解特性。
3.
Polytetrafluoroethylene(PTFE), a kind of self-lubricating material with good comprehensive performances such as very low frictional coefficient, good thermal stability and anti-crrosion, has been widely used in verious engineering fields.
聚四氟乙烯(PTFE)是一种综合性能优良的自润滑材料,具有极低的摩擦系数、优异的热稳定性和耐腐蚀性,被广泛应用于工程领域。
补充资料：聚乙烯比咯烷酮 ,聚维酮, 聚乙烯比咯酮
药物名称：聚乙烯比咯酮
英文名：Polyvidon
别名： 多乙烯比咯酮;聚烯比酮;聚乙烯比咯烷酮 ,聚维酮, 聚乙烯比咯酮
外文名：Polyvidon
适应症： 用于外伤性出血及其它原因引起的血容量减少。 提高血浆渗透压,增加血容量.
用量用法： 静注：用量视病情而定，一般为５００～１０００ｍｌ。
注意事项： ２岁以下儿童忌用。
规格： 注射液：３．５％２５０ｍｌ,500ml。
类别：血浆及血浆代用品
英文名：Polyvidon
别名： 多乙烯比咯酮;聚烯比酮;聚乙烯比咯烷酮 ,聚维酮, 聚乙烯比咯酮
外文名：Polyvidon
适应症： 用于外伤性出血及其它原因引起的血容量减少。 提高血浆渗透压,增加血容量.
用量用法： 静注：用量视病情而定，一般为５００～１０００ｍｌ。
注意事项： ２岁以下儿童忌用。
规格： 注射液：３．５％２５０ｍｌ,500ml。
类别：血浆及血浆代用品
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条