一缩二乙二醇

Polyesters are produced by a condensation reaction of a diol, such as ethylene glycol, with a dicarboxylic acid.

聚酯是由一缩合一二醇，例如乙二醇，以二元酸。

The method of liquid phase synthesis of dioxane from the cyclodehydration of diethylene glycol catalyzed by ASP-type solid acidic catalysts was studied.

研究了ASP型固体酸催化剂一缩乙二醇环化脱水合成1，4-二氧六环的液相反应。

A novel planar chiral diferrocenylimine-diols 6 was synthesized by the condensation of R, S(subscript p-1-(2-diphenyl hydroxyl methyl) ferrocenylethylamine [R, S(subscript p-4] with phthaldehyde in anhydrous ethanol, and was crystallographically characterized.

通过R，S(下标 p-1-（2-二苯基羟甲基）二茂铁乙胺[R，S(下标 p-4]和对苯二甲醛在无水乙醇中的缩合反应合成了一种新型平面手性双二茂铁亚胺二醇化合物6，并经X-射线衍射分析它的晶体结构。

The formation of charge transfer complex was studied in the first part. The second part includes the synthesis and characterization of the acrylated unsaturated polyester and the kinetic studies on the Ar-UPE/ triethylene divinyl ether (DVE-3) photocuring system, the rheology and properties of film after photocuring. The third part includes the synthesis and characterization of the urethane modified unsaturated polyester and the kinetic studies on the PU-UPE/DVE-3 photocuring system, the rheology and properties of film after photocuring. The fourth part includes the synthesis and characterization of the vinyl ether end capped polyurethane and the kinetic studies on the VE-PU/DVE3 photocuring system, the rheology and properties of film after photocuring.

整个研究工作分为四个部分：一是电荷转移复合物的研究；二是丙烯酰氧基化不饱和聚酯的合成，表征，Ar-UPE/二缩乙二醇二乙烯基醚（DVE-3）体系光固化动力学研究以及Ar-UPE/DVE-3体系流变性能和光固化后涂膜综合性能的研究；三是氨酯改性的不饱和聚酯的合成，表征，PU-UPE/DVE-3体系光固化动力学研究以及该体系光固化后涂膜综合性能的研究；四是乙烯基醚封端的聚氨酯的合成，表征，VE-PU/马来酸二甲酯体系光固化动力学研究以及VE-PU/DMA体系流变性能和光固化后涂膜综合性能的研究。

A new functional electroluminescent copolymer is reported in which chromophores and hexa segments alternate along the polymer backbone.

采用Wittig反应合成了一种分子主链由烷氧基取代的1，4二苯乙烯基苯聚对亚苯基亚乙烯基(PPV的三个单元的齐聚物与柔性隔离链段五缩六乙二醇组成的交替型蓝绿色发光共聚物。

Under these conditions, the yield of cyclohexanone glycol ketal could be reach 90.4%, indicating that rare earth composite solid superacid SO4(superscript 2-)/ZrO2(superscript 3+) is a good catalyst for the synthesis of cyclohexanone glycol ketal.

在此条件下，缩酮收率可达90.4%，说明稀土复合固体超强酸SO4(上标 2-)/ZrO2/Gd(上标 3+)是一种合成环己酮乙二醇缩酮的优良催化剂。

The silk fabric s were ingrafted with acrylamide monomer by the radiation of Co-60γradial and then were coordinated by polysaccharid and citric acid solution in order to improve its capability of withstandingness of crease.

结果表明，在最佳工艺条件下，一缩二乙二醇甲基丙烯酸双环氧化物产率可达到73.4%；经其整理的真丝织物折皱回复角、强力均有提高，但对织物白度有一定影响

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。