醚

Copolymers with the naphthoyimine chromophores were firstly obtained through Pd-catalyzed Heck reaction. The copolymers had good solubility in common solvents due to the presence of alkoxyl substituents in the molecular chains.

在钯催化下利用Heck耦合反应制备了以萘酰亚胺为发色团的共聚物，通过侧链上引入丁氧基醚链，使得聚合物具有很好的溶解度，能溶解在常用有机溶剂中。

Halohydroxylation reaction of allenyl sulfides occurs predominately with the β,γcarbon-carbon double bonds with the halogen atom bonded to the middle carbon atom of the allene moiety.

在1，2-联烯基硫醚分子中由于同时存在着硫原子和具有两个相互垂直π-键的累积双烯结构，使其具有一些特殊的反应性能。

Reduction of 2-bromodifluoromethyl substituted propargyl vinyl ether afforded the difluorovinyl propargyl ether, which rearranged to the corresponding allene bearing a gem-difluoromethene in the mid-aliphatic chain.

第三部分，在碱性条件下，α-氟烷基乙酸乙酯与炔丙醇反应制备了一系列的氟烷基取代的炔丙基烯基醚，并研究了它的Claisen重排反应，得到了2，4-不饱和的氟烷基酮。

The second layer (10) comprises: 100 parts by weight of an acrylonitrile-butadiene rubber, said acrylonitrile rubber comprising from 20 to 65 percent by weight of bound acrylonitrile; from 3 to 20 parts by weight, per 100 parts by weight of the NBR, of at least one acid acceptor; from 1 to 10 parts by weight, per 100 parts by weight of the NBR, of at least one organophosphonium salt; and from 0.25 to 10 parts by weight, per 100 parts by weight of the NBR, of at least one amidine.

公开的是一种包含直接相互接触的第一层与第二层的软管；第一层包含从四氟乙烯、六氟丙烯、偏二氟乙烯、和全氟乙烯醚衍生的一种热塑性四元共聚物；第二层包含100重量份丙烯腈丁二烯橡胶，所述丙烯腈橡胶包含约20～约65wt％结合丙烯腈；每100重量份NBR约3～约20重量份至少一种酸受体；每100重量份NBR约1～约10重量份至少一种有机盐；和每100重量份NBR约0.25～约10重量份至少一种脒。

Through chloromethylated, aminate and hydrolytic reaction, OH-form quaternized PES-C membranes were synthesized.

通过氯甲基化、胺化、水解等反应，制得了OH型季胺化酚酞型聚醚砜阴离子交换膜。

The yield was 84%. With OP-10, NPE as the the catalyzer for the diazo reaction, the use of hydrolyzed propenenitrile instead of propenoic acid, and OP-10 as the catalyzers of the aminate reaction, these experiments showed the feasibility of industralization, due to the much reduced costs, shortened reaction time and a higher yield.

采用壬基酚聚氧乙烯醚（OP-10）、萘磺酸甲醛缩合物作重氮化反应催化剂，丙烯腈加成、水解替代丙烯酸，OP-10做氨化反应催化剂，通过四因子三水平正交试验法实验，得到较佳反应参数，反应时间、收率、成本都大大降低，适宜工业化生产。

Polyimide/nano carborundum composite films were made from pyromellitic dianhydride、4, 4'-aminodiphenyl ether、N, N'-dimethyl acetamide and nanometer carborundum.

以均苯四甲酸二酐、4，4'-二氨基二苯醚、N，N'-二甲基乙酰胺为原料，经化学合成反应制备了聚酰亚胺／纳米碳化硅复合薄膜。

As to the curing reaction of the modified phenolic epoxy resins, there is the etherification reaction between phenolic hydroxyl groups and epoxy groups. When the secondly modified epoxy resins are cured at higher temperatures respectively, the absorbance increasing at 1670Cm〓 and 1640Cm〓 are indicative of aminolysis reaction.

对于改性酚醛环氧树脂的固化反应，有酚羟基和环氧基间的醚化反应，二次改性环氧树脂在较高的温度固化时，1670Cm〓和1640Cm〓吸收峰的增加说明有氨解反应。

2-Substituted-3,4-dihydro-1(2H)-isoquinolinones were synthesized from methyl 3-hydroxy-ben- zoates via allyl etherification, Claisen rearrangement, oxidation, reductive amination and aminolysis for the first time.

以3-羟基-4-甲氧基苯甲酸甲酯等为原料，通过烯丙基醚化、Claisen重排、氧化、与伯胺反应、还原、分子内酯的胺解六步反应合成了一系列2-取代-3，4-二氢-1-异喹啉酮类化合物。

Jiangsu Anpon Electrical Chemistry Co., Ltd., Huaian 223002, Jiangsu, China Abstract: 2-Amino-4,6-dimethoxy-1,3,5-triazine, an important intermediate for preparing cinosulfuron, was synthesized utilizing 2,4,6-trichloro-1,3,5-triazine as raw material via ammonization, methoxylation. The purity was 96.0% and the average yield was 90.4%.

江苏安邦电化有限公司，江苏淮安 223002 摘要：2-氨基-4，6-二甲氧基-1，3，5-三嗪是合成醚磺隆的重要中间体，以三聚氯氰为起始原料，经氨化、甲氧基化中试反应得到2-氨基-4，6-二甲氧基-1，3，5-三嗪，纯度为96.0%，平均收率90.4%。

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。