多元醇

A series of casting polyurethane elastomers were synthesized by using polyester polyols,4,4'-diphenylmethane diisocyanate,and chain extender mixture of 1,4-butanediol with trimethylolpropane.

用聚酯多元醇(PBA、PEA、PEPA、PCL)、4，4'-二苯基甲烷二异氰酸酯和混合扩链剂等原料合成了浇注型聚氨酯弹性体。

As for its molecular mechanism, there are four hypotheses: glucose-induced activation of protein kinase C isoform; increased formation of glucose-derived advanced glycation end-products; increased glucose flux through the polyol pathway; and increased flux through hexosamine pathway.

对于其发病的分子机制，目前有四种假说：多元醇途径的增加；糖基化终末产物(advanced glycation end products，AGEs)的形成增加；蛋白激酶C(protein kinase C，PKC)的激活；己糖胺途径的增加。

With increasing the percent of azide substitution, maximum temperature of thermal degradation is also increscent, a linear relationship exists between the glass transition temperature of B and percent of azide substitution.

随着叠氮化反应程度的加深，最大热分解温度升高，不同程度叠氮化取代率的叠氮聚醚多元醇的玻璃化温度与叠氮化取代率成线性关系。

The result indicated that, gathers in advance the emulsion water resistance and mechanics performance which in the body preparation method the one-stage process obtains is good, but two steps obtain the emulsion stability is good; The neutralizaing agent triethylamine amount used should enable to achieve neutral between x-y, to gathers in advance the body disperser and the emulsion stability only then is advantageous; The water affinity chain extendor DMPA content to the emulsion viscosity, stable and the emulsion cellophane water resistance has the remarkable influence, its amount used general control between x-y; Hard section isocyanogen diethylene glycol dinitrate primary control paint film degree of hardness, module, anti-avulsion, wear-resisting and so on performance, the soft section low-molecular polymer polyols primary control paint film elasticity, hydrolisis performance and so on bears the low temperature and bears

结果表明，预聚体制备方法中一步法得到的乳液的耐水性和力学性能较好，而两步法得到的乳液的稳定性好；中和剂三乙胺的用量应使中和度达到x-y之间，对预聚体的分散和乳液的稳定性才有利；亲水扩链剂DMPA的含量对乳液的粘度、稳定性及乳液胶膜的耐水性有着显著的影响，其用量一般控制在x-y之间；硬段异氰酸酯主要控制涂膜的硬度、模量、抗撕裂、耐磨等性能，软段低聚物多元醇主要控制涂膜的弹性、耐低温和耐水解等性能

Some affecting factors on properties of the adhesive were discussed, including relative molecular weight of polyester polyol, Chain-extender, isocyanurate index and water.

讨论了聚酯多元醇的相对分子质量、扩链剂、异氰酸酯指数、水分等对聚氨酯油墨连接料性能的影响。

We may measure the content of kalium and sodiumin polyether polylol with the method.

利用原子吸收光谱法测定了聚醚多元醇中的钾、钠含量，具有快捷、准确等优点。

Application of polymer polyol in microcellular polyurethane elastomer was researched.

对聚合物多元醇在聚氨酯微孔弹性体中的应用进行了研究。

Using organogel fibers formed by the poly alcohol acetel derivaties gelators as atemplate, the SiO2 and TiO2 nanoparticles were prepared the first time.

首次以多元醇缩醛衍生物凝胶为模板制备了纳米级二氧化硅、二氧化钛及其复合粒子。

Nanosize SiO_(2) particles were prepared using water-in-oil microemulsion method in polyether polyol with hydrolysis and condensation reactions of tetraethyl orthosilicate by means of controlling molar ratio of water to surfactant and selecting moderate hydrolysis temperature.

选择适当的乳化剂和水解温度以及控制水与乳化剂的摩尔比，采用W/O型微乳液法在聚醚多元醇中通过正硅酸乙酯的水解、缩合反应合成了纳米SiO2。

The above resins are irregular transparent solid which are the products of esterification by pentaerythrite and the adducts of rosin and maleic anhydride.

马林酸树脂又名失水苹果酸树脂，由松香与顺丁烯二酸酐加成反应后并以多元醇酯化而制得的不规则透明粒片状固体。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐