根据本发明，得到具有窄分子量分布的烯烃(共)聚合物。
According to the present invention, an olefin (co) polymer with a narrow molecular weight distribution is obtained.
介绍了低聚合度、窄分子量分布的聚合物分散剂的控制方法。
The controlling methods of polymeric dispersant with low polymerization degree and narrow molecular weight distribution were introduced.
具有窄分子量分布的树脂会有低的出口膨胀，但这不意味着它一定有较少的口模积料。
Resins with narrow molecular-weight distribution can have lower die swell, but this doesn't necessarily mean less buildup.
具有窄分子量分布的树脂往往难于加工，它还产生低分子组分，这反过来又引起积料。
Resins with narrow MWD are often hard to process, which can generate low-MW components, which in turn can cause die buildup.
以高氯酸锌为催化剂，环氧乙烷和低碳醇反应生成窄分子量分布的乙二醇单低碳醇醚，确定了适宜的工艺条件。
Reaction of lower primary alcohol and ethylene oxide was studied by zinc perchlorate as catalyst, and the products are narrow distributed. The suitable process conditions have been established.
以发烟硫酸-高氯酸为催化剂，通过四氢呋喃的阳离子开环聚合合成了窄分子量分布的聚四氢呋喃(PTHF)。
Polytetrahydrofuran (PTHF) with narrow molecular mass distribution was prepared by cationic ring-opening polymerization of tetrahydrofuran using H_2SO_4 · SO_3-HClO_4 system as a catalyst.
在碱溶性树脂中，以低分子量、窄分子量分布、高酸值、较低玻璃化温度的苯乙烯—丙烯酸共聚树脂（简称苯丙树脂）最具代表性。
Styrene-acrylic resin, a typical one among all alkali-soluble resins, has the criteria of low molecular weight, narrow molecular weight distribution, high acid value and low Tg.
乙氧基化制得的烷基酚聚氧乙烯醚产品分子量分布窄，浊度高，外观色泽好，副产物聚乙二醇（PEG）低。
The polyoxyethylene alkyl phenyl ether obtained by calcium oxide catalyst had perfect quality with narrow molecular weight distribution, high cloud point, good appearance and low by - product PEG.
VB族元素钒、铌、钽的单茂金属化合物作为烯烃催化剂可得到分子量分布相当窄（1.05）的聚烯烃；
The half-metallocene of the elements V, Nb and Ta in VB group could be used in the polymerization of olefin to prepare polymer with rather narrow molecular weight distribution (1.05).
水不溶沉淀物（乙酰化木质素）的重均分子量分布在341到253之间，分散性系数分布在1.1到1.2这一窄范围内。
The water insoluble precipitate (acetic acid lignin, AcL) had a low weight-average molecular weight range from 341 to 253 (Mw) and a narrow molecular weight distribution from 1.1 to 1.2.
该聚苯乙烯与烷基卤化物、烷基卤化铝、脱水剂混合，用溴素溴化得到窄分布低分子量溴化聚苯乙烯。
The polystyrene is mixed with alkyl halide, alkyl aluminium halide, dehydrant, brominated by bromine to get narrow distributed brominated polystyrene with low molecular weight.
辽河催化裂化澄清油中芳烃含量高、沥青质含量低、分子量分布窄，是生产针状焦的优质原料，但其所含的灰分对澄清油的加工利用有着较大影响。
Liaohe FCCDO is a better raw material to produce needle coke because it has a high content of aromatics, low content of asphalt and narrow distribution of molecular weight.
原子转移自由基聚合(ATRP)反应是实现活性聚合的一种颇为有效的途径，可以合成分子量可控、分子量分布窄的各种聚合物。
Atom transfer radical polymerization (ATRP), which can yield polymers with controlled molecular weight and low polydispersity, is an effective approach to realize living radical polymerization.
通过由对氯甲基苯甲酸引发的苯乙烯原子转移自由基聚合（ATRP）合成了分子量可控、分子量分布窄的新型功能聚合物。
A novel type of functional polymer with designed structure, controlled molecular weight and low polydispersities can be prepared via ATRP (Atom Transfer Radical Polymerization).
本发明具有制得的聚合物分子量高、分子量分布窄，聚合方法绿色环保的优点。
The polymer molecular weight is high, the molecular weight distribution is narrow, and the polymerization method is green and environmental-protection.
还提供了一种使聚烯烃分子量分布变窄的方法，包括使烯烃、辛格勒·纳塔型催化剂和本文指定化合物相接触。
Also provided is a process for narrowing the molecular weight distribution of a polyolefin comprising contacting an olefin, a Ziegler-Natta catalyst and a compound specified herein.
结果表明，这种催化剂的催化活性高，合成乙氧基化产物分子量分布窄，色泽好。
The results showed that this type of catalyst possesses not only high catalytic activity but also narrow distribution property, and the color of ethoxylates are also good.
研究发现，环流反应器能够使产品分子量分布变窄，提高产品中碳酸酯基团含量及催化剂的催化效率。
It was found that loop reactor could narrow the molecular weight distribution, increase the content of carbonate in product molecules and improve catalyst efficiency.
研究发现，环流反应器能够使产品分子量分布变窄，提高产品中碳酸酯基团含量及催化剂的催化效率。
It was found that loop reactor could narrow the molecular weight distribution, increase the content of carbonate in product molecules and improve catalyst efficiency.
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