查询词典 polymer

According to the characteristics of organic electroluminescence, we studied charge carrier transportation in two-layer devices and its influence on the luminescence of devices based on polymer.

根据有机电致发光的特点，本文研究了以聚合物发光为主的双层有机电致发光器件的载流子输运特性及其对器件发光性能的影响。

Since the liquid ink includes the colorant surface-treated by a polymer comprising units derived from at least a nitrogen-containing polymerizable monomer, it exhibits improved chargeability, reduced conductivity variability and improved dispersion stability at a lower amount of charge control additive.

因为该液体墨水含有用聚合物进行表面处理的着色剂，该聚合物含有的单元来自至少一种含氮的可聚合单体，所以在较少量电荷控制添加剂时，它具有改善的荷电率，降低的导电率可变性以及改善的分散稳定性。

A polymer is a chemical compound with large molecules made of many smaller molecules of the same kind.

一个聚合体是一种大分子结构的化合物，通常由多个小分子聚合物聚合而成。

Chitin is a kind of natural polymer with high linear degree.

甲壳素是一种线性度非常高的天然高分子物。

Chitosan, with wide application, was a kind of natural polymer materials prepared from chitin.

壳聚糖是由甲壳素经化学改性得到的有广泛应用价值的天然多糖高分子材料。

A polymer of chloroprene widely used as an oil and heat resistant rubber.

一种作为耐油耐热橡胶而广泛使用的氯丁二烯聚合物。

The optimized preparation conditions are:total polymer amount is 25 mg; 2-IT: Lf when thiolation is 40: 1; and the outer waterphase is 1% sodium cholate solution.

以粒径为指标，最终筛选的优化制备条件为：聚合物总量25mg，巯基化试剂2-IT∶Lf摩尔比为40∶1；外水相为1％的胆酸钠溶液。

These experimental works could provide insight for understanding the relationship between the structure and properties of chromophore and polymer and the photoinduced microstructure and all-optical switching effect.

这些研究工作有利于揭示生色团及聚合物的结构和性能与光致有序微结构及全光开关效应之间的关系。

A cinchonine imprinted monolithic polymer was directly prepared in a fused capillary column by in-situ polymerization.

借助于提高流速和使用梯度洗脱在其上实现了快速手性分离。

It is demonstrated that the chiral quaternary ammonium salts catalysts exhibit promising catalytic properties for the substrate. Part III: The synthesis and the characterizing of the macroporous aminomethyl resin-supported cinchona alkaloid complexes and the study on its catalytic properties The part consists of two subsections. the macroporous aminomethyl resin -supported cinchona alkaloid complexes were synthesized by the stuff (cinchonine, quinine and macroporous aminomethyl resin). Their structures were characterized by means of elemental analysis, XPS, TG/DTA; the chiral polymer-supported complexes were first used as catalysts for the reduction of ketones. Their catalytic properties for the reduction processes were investigated. The comparison of the products e.e., the conversion of the substrate among different reduction processes was employed with determined by HPLC. The effects of the time, the temperature, the ratio of catalyst to substrate, reaction solvent as well as the recycle times were also discussed.

第三章聚-4-氨甲基苯乙烯负载金鸡纳碱金属络合物的合成与表征及其不对称催化性能研究本章分为两节，以辛可宁和奎宁及聚-4-氨甲基苯乙烯为原料，合成了4种聚-4-氨甲基苯乙烯负载金鸡纳碱络合物催化剂，并对它们的结构用元素分析、X-射线光电子能谱、TG/DTA等几种测试手段进行了表征；首次将所合成的手性高分子负载的金属络合物用于催化芳香酮不对称还原反应，详细研究了所得的手性高分子负载的金属络合物对不同底物的催化性能，用HPLC等分析手段定量检测了还原过程的底物转化率及其产物对映异构体选择性，并考察了反应时间、反应温度、催化剂和底物投料比、反应溶剂和循环次数对催化性能的影响。

This paper designs the communication system of radio telescope FAST.

针对500m口径球面射电望远镜FAST分布式控制系统的特点完成了其通信系统的设计。

Political sheep's step-by-step a large number of fossils unearthed in the county soil Ma Ali after rural village in the middle of sallow pelitic siltstone.

步氏和政羊化石大量出土于广河县阿力麻土乡后山村，产于灰黄色泥质粉砂岩中。