查询词典 polymerization

Some different catalysts for the polymerization of aromatic nitriles were investigated.

论文摘要 1。对芳香族腈聚合的催化体系进行了研究。

It was found that Lewis acid-metal is a preferable catalyst system for the polymeri- zation of aromatic nitriles, and the polymerization rate is as about 10 times fast as Lewis acid alone.

结果表明以含质子化合物或水与Lewis酸组成的体系并不是有效的催化体系，不适用于催化芳香族腈进行聚合。

It is necessary to studying the methods of controlling the temperature of polymerization, which can largely promote quality and quantity of production. So it has great significance on the production of chemical industry.

而反应温度是影响聚合反应最重要的参数之一，研究聚合反应温度的相关控制方法，以提高产品的产量和质量，对化工生产具有十分重要的意义。

Some conditions of depositing urea-formaldehyde resin onto the surface of red phosphorus by in-situ polymerization were studied in this paper.

研究了脲醛树脂的预聚物通过原位聚合对红磷进行包覆的一些影响因素。

Microcapsules of glyphosate were made by the method of in-situ polymerization with urea-formaldehyde resin as the outer membrane.

采用原位聚合法制备以脲醛树脂为壁材的草甘膦微胶囊除草剂。

Two types of three-arm or four-arm star-shaped hydroxy-terminated PCL weresynthesized via the ring-opening polymerization of CL with multifunctional initiator and 〓catalyst.

以多元醇(季戊四醇或2，2-羟甲基丁醇)为引发剂、〓为催化剂，引发CL单体的聚合，合成了端羟基化的三臂或四臂星型PCL聚合物。

Two types of three-arm or four-arm star-shaped D,L-PLGA50 copolymer withnarrow molecular weight distribution were synthesized from the polymerization of MGwith multifunctional initiator pentaerythritol or trimethylolpropane and〓 catalyst.

以多元醇(季戊四醇或2，2-羟甲基丁醇)为引发剂、〓为催化剂，研究了MG单体的聚合行为。

Two novel well-defined star-graft copolymers with poly as main chain are successfully prepared by combination of anionic and atom transfer radical polymerization. Anionic copolymerized 2,5-epoxypropyl-1-ethoxyethyl ether with EO by initiation of mixture of diphenylmethylpotassium and polyol [1,1,1-trispropane or pentaerythritol] to give the well-defined three-arm star poly and four-arm star poly.

用核磁共振(~1H NMR)、红外光谱、元素分析、气相色谱—质谱、凝胶渗透色谱和基质辅助激光解吸附电离飞行时间质谱(MALDI-TOF-MS)等手段对中间产物及最终产物进行了详细地表征，证明了这种合成聚醚为主链的接枝共聚物的方法是可行的，并且是成功的。2。

Tar is undesirable due to condensation, formation of tar aerosols and polymerization to form more complex structures, which cause blockage in transporting pipe and damage to engines and turbines. Then, tar is still the bottleneck of the technology.

生物质气化是一种主要的生物质能利用方式，但是在气化过程中产生的焦油给生物质气化技术应用带来了一些问题。

In this paper ,two kinds of surface modification method(chemical measure and soap-free polymerization ) are used.

本论文分别采用化学法和无皂乳液聚合法对纳米二氧化硅进行表面改性。

It seems likely that Kraft will return with a better offer.

看起来卡夫要重新考虑一个更好的出价了。

But he'd rather burn off my feelers and watch me squirm.

可他却放任那个家伙对我为所欲为！