查询词典 polymerization

Dithio and trithio-compound can be used as transfer agent in living free radical polymerization, for preparation of polymers with complex structures.

近年来，聚合反应技术的发展为合成各种拓扑结构的聚合物提供了强有力的手段。

Nitratomethyl-3-ethyloxetane was synthesized by the process of cyclization, nitation from trimethlolpropane and diethyl carbonate, and the homopolymer of 3-nitratomethyl-3-ethyloxetane was synthesized with 1,4-butanediol as initator and boron trifluoride etherate as an catalyst by cationic ring-opening polymerization.

以三羟-甲基丙烷和碳酸二乙酯为原料经环化、硝化两步反应合成了化合物3-硝酸酯甲基－3-乙基氧丁环；采用1，4-丁二醇为引发剂，三氟化硼乙醚(BF3Et2O)为催化剂，NIMEO发生阳离子开环聚合得到一种端羟硝酸酯均聚醚PNIMEO。

Secondly, the author prepared polypyrrole using emulsion polymerization method as well as water soluble polyaniline by adding a small amount of surfactant. Both knids of materials are used as sensing film of QCM trimethylamine gas sensors, respectively.

其次，采用乳聚法和添加少量表面活性剂诱导的方法分别制备了聚吡咯、水溶性聚苯胺，并将它们作为敏感膜材料制作了QCM气敏传感器。

ABSTRACT A series of novel acrylic polymers were synthesized by emulsion polymerization for car underbody coatings, which have no environmental pollution.

为了开发对环境无污染的环保型汽车底盘用涂料，本文通过乳液聚合研制了一系列丙烯酸类聚合物。

ABSTRACT A series of novel acrylic polymers were synthesized by emulsion polymerization for car underbody coatings, which have no environme...

为了开发对环境无污染的环保型汽车底盘用涂料，本文通过乳液聚合研制了一系列丙烯酸类聚合物。

This result agrees well with the literature values of 23.5 and 22.0 kcal/mol obtained for the solution polymerization of partially neutralized acrylic acid (pH = 11) and undissociated acrylic acid(pH = 1), respectively.

这一结果也同意与文学价值的23.5和22.0千卡/摩尔获得的溶液聚合部分抵消丙烯酸（ pH值= 11 ）和undissociated聚丙烯酸（ pH值为1），分别。

In some cases impurities are present as a result of the polymerization process and it may be uneconomic to remove these to get the pure polymer.

在某些情况下，杂质的存在是由于聚合过程的结果，要去除他们而得到纯的聚合物可能是不经济的。

Second, aminolysis of polystyrene and poly prepared by reversible addition-fragmentation chain transfer polymerization was investigated. The product of the former contains predominantly double molecular weight species by the formation of disulfide bond, whereas the latter formed coupled species which consequently cleaved to unimolecular weight species.

由RAFT聚合的机理可知，聚合最终得到的聚合物的结构包含双硫酯基团，它是聚合物链保持活性特征的重要体现，同时它为聚合物的端基官能化提供了一个重要的途径，其中氨解反应是一个被人们广泛采用的方法，它在很温和的条件下将端基去掉，同时还能将双硫酯端基变成硫醇端基。

Finally, the unreactive reason of 3,3-dinitro-1-butene in polymerization was analyzed.

分析了3，3-二硝基-1-丁烯自由基聚合反应失败的原因。

In DMSO, the polymerization of methyl methacrylate could be carried out efficiently. However the photopolymerization was inhibited in acetonitrile. It was ascribed to the complex formed between coumarin 1 and HTIB photolyzed to unreactive species after irradiation in acetonitrile.

在一般极性溶剂中如DMSO中能有效地引发甲基丙烯酸甲酯光聚合，而在电子受体性质的极性溶剂如乙腈中，光聚合反应受阻，这归结于香豆素1与羟基苯基碘鎓盐形成络合物，使得光反应后生成不具活性的产物。

The objective is to subjugate and discourage the people, because that allows the elite to continue to rule unopposed.

其目的是压制和打击人民的积极性，因为这可以让实权派继续统治不会沦为反对派。

GOD,this is the second time you vanquished me!

天啊，这是第二次你打败了我！