查询词典 vinylidene

Preparation of poly(vinylidene fluoride-co-hexafluoro propylene)-based symmetric microporous membranes by a dry/wet phase inversion method ;2. PES-C ultrafiltration membranes were prepared by phase inversion method using dimethylacetamide as solvent and EE as additive.

通过改变铸膜液中添加剂乙醚的含量，采用相转化法在平板刮膜机上制备了一系列超滤膜，考察了添加剂乙醚含量对铸膜液黏度、凝胶速度、膜性能和结构的影响，研究了PES-C/DMAc体系中添加剂乙醚作用的规律。

The polyacrylate-/vinylidene chloride/nanomontmorillonite Composite emulsion was prepared by seed emulsion polymerization.The influence of the content of nanomontmorillonite on composite emulsion diameter ,mechanical properties and thermal stability is probed.

以偏二氯乙烯和蒙脱土作改性剂，采用种子乳液聚合方法制备了聚丙烯酸酯偏二氯乙烯/蒙脱土共聚物复合乳液，研究了蒙脱土质量分数对共聚物乳胶粒径、乳胶膜抗拉强度与断裂伸长率及热稳定性的影响。

In the photolysis of 9, phosphine dissociation is followed by addition of HCl yielding the neutral vinylidene complex Cl[Ru1]=C=CHC(CCl3)2 10, [Ru1] = Cp

当进行光裂解错合物的反应时，在加入氯化氢分子的状况下，产生一个中性的钌金属亚乙烯基错化合物Cl[Ru1]=C=CHC(CCl3)2 10， [Ru1] = Cp(PPh3Ru 并且伴随著一个三苯基磷分子的离去。

Analogous complexes 3a" and 4a"= CpRu(PPh32, Ar = para-C6H4OMe containing methoxy group at the para-position of gem-diphenyl group were similarly obtained from protonation of the corresponding acetylide complexes via formation of vinylidene intermediate. But only complex 3a'= CpRu(PPh32, Ar2 = fluorenyl is stable in solution, and decomposed to unidentified complex when heated to reflux in THF. Deprotonation of complex 4a in the presence of base gives neutral acetylide complex 6a.

在两个相邻位置的苯基对位位置上接有一甲氧基的衍生物3a&和4a&也可利用类似的质子化反应合成，唯有错合物3a'= CpRu(PPh32， Ar2 = fluorenyl 可以稳定於溶液中，不会进行上述反应，如将其溶於四氢呋喃溶液加热至沸腾则会分解产生无法鉴定的化合物。

A second group includes those compositions, which include an organic polymeric binding material, eg, mixed cellulose esters of monobasic or dibasic acids such as cellulose acetate succinate; an addition-polymerizable ethylenically unsaturated compound, eg, vinylidene and vinyl monomers, preferably of the acrylic or alkacrylic ester type; eg, triethylene glycol diacrylate; and an addition-polymerization initiator which forms radicals under the influence of actinic radiation, eg, anthraquinone.

第二组包括那些作品，其中包括有机聚合物具有约束力的物质，例如，对一元或二元酸混合纤维素酯，如醋酸纤维素琥珀酸； 1此外，聚合ethylenically不饱和化合物，例如，偏和乙烯基单体，丙烯酸最好的或alkacrylic酯类型，如，三乙二醇二丙烯酸酯；和加成聚合引发剂的形式下光化辐射的影响自由基，例如，蒽醌。

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。