聚乙烯醇

Different from conventional fabrication of cathode powder, non-chelating polymer polvinyl alcohol serves to sterically entrap the metal cationa in a manner thewey which facilitates the formation of an atomistically homogeneous precursor material. And, calcining the solid precursor material to form a mixed metal oxide material, that is perovskite structured powder La0.5Sr0.2Co0.5Fe0.5O3.

该方法与传统方法不同，采用非螯合聚合物－聚乙烯醇(PVA， Polvinyl alcohol)作为阳离子的载体，形成含有La(上标 3+)，Sr(上标 2+)，Co(上标2+)，Fe(上标 3+) 4种金属阳离子和非螯合聚合物的均匀溶胶，干燥生成固体凝胶状前驱体。

The polarizer having high polarizing activities and durability to heat and moisture was prepared by dipping the newly synthesized azoxy dye into oriented and stretched polyvinyl alcohol film.

使用新合成的氧化偶氮染料对定向和拉伸的聚乙烯醇薄膜染色，制备了具有较高偏振度和耐高温高湿性能的偏振片。

PVA/starch films were prepared by extrusion casting and biaxially stretching technologies.

采用挤出流延和双向拉伸工艺制备了聚乙烯醇/淀粉薄膜。

With its remedial effects and good property, the carrier of natural aborable and non-poisonons, innocuous bletilla hyacinthine gum is of better value in clinical application than pure chemical carrier that had previously been used.

近些年来，有报道采用聚乙烯醇配制药液注入的方法，在一定程度上克服了一般溶液的不足，但实验证明，PVA作为载体虽然成膜性较好，但粘附性差，注入后仍易被咳出，加之其无法被机体生物降解吸收，滞留气道及易引起意外阻塞性副反应，故仍不

Nine kinds of materials, including granular activated carbon, peat, shale-haydite, mudrock ceramicite with size of 1 mm and 3 mm, kaolin clay, polyvinyl alcohol, fine sand and white sand were comparied for PRB reactive media testing.

以石油类污染地下水为研究对象，选用颗粒活性炭、草炭土、粒径为1 mm和3 mm的页岩陶粒、泥岩陶粒、高岭土、聚乙烯醇、细砂和白砂等9种材料进行PRB反应介质筛选及其性能研究。

Composite films from polypyrrole and some conventional polymer matrixes such as poly and poly,could not only integrate the exciting multifunctionality of polypyrrole as well as the good film-formability and much lower cost of the matrix polymers,but also produce a novel coadjutant effect of...

聚吡咯与常规聚合物基体如聚乙烯醇、聚氯乙烯等形成的复合膜不仅可以综合聚吡咯奇异的多功能性与常规聚合物的易成膜性和低成本性于一体，而且可望发挥两者的协同效应，从而大大拓宽其应用领域。

Carboxymethyl groups were proved to be linked to PVA by Fourier transform infrared spectra and the degree of carboxymethyl substitution on the PVA was 2.77%determined by conductometric titration.

通过傅立叶红外光谱表征证明了羧甲基官能团已经被引入到聚乙烯醇分子链上，而且利用电导滴定测定了它的羧甲基官能团的取代度为2.77%。

Results indicate that as the molecular mass of polyethylene glycol increases, the conductance is increased obviously, and the surface tension is decreased from 36.28 mN/m to 31.30 mN/m, while the cloud point is increased from 39.6 ℃ to 58.9 ℃. Their emulsifying abilities to BA, MMA and BMA are superior to that of OP-10, and the surfactants is homopolymerize or copolymerize with acrylate at 70 ℃ under the initiation of AIBN.

结果表明，随聚乙烯醇分子量的增加，非离子表面活性剂的电导率显著增加、表面张力由36.28 mN/m降低至31.30 mN/m、浊点由39.6 ℃增加至58.9 ℃，对丙烯酸丁酯、甲基丙烯酸甲酯和甲基丙烯酸丁酯的乳化能力均优于常用乳化剂OP-10，以AIBN作引发剂在70 ℃下既能均聚又可与丙烯酸酯进行共聚反应。

This paper investigates the conditions of immobilization of chitosan adopting sodium alginate,poly and glutin as carriers,and farther uses the immobilized chitosan to adsorb the Cuand Crin water.

采用海藻酸钠、聚乙烯醇、明胶作为载体，对壳聚糖的固定化条件进行了研究，并以制成的固定化壳聚糖吸附水中Cu2+和Cr6+。

The methods of determination of crotonaldehyde in various samples of the PVA producing line by gas chromatography and flame ionization detector are discussed in this paper.

探讨了采用气相色谱法，氢火焰离子化检测器测定聚乙烯醇生产过程各种有机物料中的丁烯醛含量的方法以及操作条件、内标校正因子的求法。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。