高分子

DFA-PEG polyester and its derivant were novel macromolecule surface activityreagent, its molecule contains special structural hydrophilic and lipophilic group.

DFA-PEG聚酯及其衍生物为新型的高分子表面活性剂，其分子中含有特殊结构的亲水亲油性基团。

BACKGROUND: Chitosan and its derivant are environmental-friend natural macromolecular materials, characterizing by great flocculation and adsorption capacities caused by electrophilic group including amino and hydroxyl groups, as well as its long-chain molecular structure. So chitosan is widely used as flocculants in domains of sewage disposal, food refining as well as Chinese medicine purification.

背景：壳聚糖及其衍生物是环境友好的天然高分子材料，其分子中丰富的带电基团如氨基、羟基以及长链分子结构赋予其优良的絮凝吸附能力，被作为絮凝剂广泛用于工业用水、食品精制以及中药液纯化等领域。

Polyether based polyurethanes are among the most interested polymers which have been used suitably for the biomedical applications, especially in cardiovascular system. In order to meet the requirements of the artificial heart program in our college, two sorts of polyether based polyurethane elastomers, PU-BD and PU-MC, were synthesized both based on prepolymer formed by the reaction of polytetramethylene ether glycol and diphenyl methane-4, 4′-diisccyanate, with 1, 4-butanediol and 3, 3′-dich...

本文介绍了两种聚醚型聚氨酯弹性体PU—BD和PU—MC的合成路线，两种弹性体的物理机械性能(曲挠、抗张强度、伸长率等)的测试结果，两种弹性材料的生物相容性试验(凝血时间，慢性组织相容性、细胞毒性等)及其结果、各种试验结果表明，这两种聚氨酯弹性材料的耐曲挠性能和生物相容性都已达到现阶段人工心脏研究工作的要求，为两种有希望的医用高分子材料。

So, in order to increase the dispersity of theNano-partical in coatings, its necessary to modify the surface of Nano-partical.

所以，必须对纳米粒子进行表面改性，削弱或者消除团聚现象，提高纳米粒子在有机高分子中的分散性。

The amphiphilic block copolymers are synthesized using TEMPO controlled polymerization method with tertrabutylammonium styrenesulfonate and divinyl benzene as monomers for each block.

此双亲性共聚高分子乃利用TEMPO之方式进行活性聚合，将磺酸钠盐聚苯乙烯单体转换成疏水性单体，第二链段选择DVB作为具备交联之单体。

Firstly, partial sulfonated polystyrene were prepared by solution polymerization with the raw materials of styrene, sodium styrene sulfonate and divinyl benzene; Secondly, the SPS/OMMT nanocomposites were prepared by intercalation polymerization with the monmers and organically modified montmorillonite.

首先，利用NMP为溶剂，BPO引发苯乙烯、苯乙烯磺酸钠、二乙烯基苯溶液共聚；同时，采用高分子的单体与有机蒙脱土插层聚合制备了磺化聚苯乙烯阳离子树脂／蒙脱土复合材料。

Among the various electrophoresis technologies, the electrophoresis with a supporting media of polyacrylamide gel has become a common separate analysis method in lab and other fields, such as biochemistry research and clinical test, due to its steady chemical properties, excellent repeatability, small electroendosmosis, easy operation and high sharpness of separation.

在众多的电泳方法中，以高分子材料—聚丙烯酰胺凝胶为支持介质的电泳因其化学性质稳定、重复性好、电内渗小、操作简单及分辨率高等优点，已成为实验室常用的分离分析手段，在生化研究和临床检验等领域日益显示出其强大的生命力。

To fully exploit the LEPs in electroluminescent applications, it is of paramount importance to develop efficient electrical contacts.

为了完全的利用电激发光高分子的特性，建立有效率的通电接触是很重要的。

The study of organic and polymer electroluminescent material have been one important research direction on optical material field.

有机及高分子电致发光材料的研究是当今光学材料研究热点之一。

In order to improve the hydrophobicility of surface and control the magnitude of the electroosmotic flow, we modified the wall by dynamic coating and treated with oxygen plasma.

其中，为了改善高分子流道表面的疏水性质及调控适当的电渗流，以动态涂布及电浆处理对管壁进行修饰。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷