醚

The reactive activation energy and frequency factor of the co--curing resin system increase with enhanced concentration of cyanate.

在 氰酸酯适量和过量条件下，固化物交联结构主要是三嗪环和噁唑烷酮结构，聚醚结构很少。

The requirement of matrix resin for the high frequency and high performance copper clad laminate was introduced and polyphenylene ether resin, cyanate resin and polyimide resin were also discussed in detail.

介绍了高频高性能覆铜板对基材的性能要求，详细讨论了聚苯醚树脂、氰酸酯树脂及聚酰亚胺树脂的特性，并简要介绍了各种树脂基覆铜板的应用情况。

In the excess of cyanate functional groups, the main structures are triazine ring and oxazolidone structure in the cured resin, and the polyether structure is of minor importance.

在氰酸酯欠量的条件下，固化物的交联结构主要是聚醚网络结构和噁唑烷酮结构，三嗪结构很少。

The said process is simple, suitable for large-scale synthesis, high in product yield and low in cost, and the prepared cyclic dithio ether compound may be open-loop polymerized to form polymer again.

本发明方法简单，适合大规模合成，产品收率高，成本低，所制备的双硫醚环状化合物可以通过开环聚合再次形成聚合物。

A novel monomer the 1-methyl-4,5-bis(4-chlorobenzoy) cyclometer containing cyclohexene were prepared,so a group of novel polys containing the cyclohexene and phthalazinone moieties was prepared by the nucleophilic displacement reaction of 1-methyl-4,5-bis(4-chlorobenzoyl) cyclohexene and 4,4′-dichlorodiphenyl sulfone and 4-(3,5-dimethyl-4-hydroxyphenyl)-2,3-phthalazin-1-one.

用新型聚合单体1-甲基-4，5-二(4-氯代苯甲酰基)环己烯与4-(4-羟基苯基)-2，3-二氮杂萘-1-酮、4，4′-二氯二苯砜单体经亲核共缩聚反应，成功地合成了含环己烯结构的杂环联苯型聚醚系列聚合物。

A novel monomer the 1-methyl-4,5-bis (4-chlorobenzoy) cyclometer containing cyclohexene were prepared,so a group of novel polys containing the cyclohexene and phthalazinone moieties was prepared by the nucleophilic displacement reaction of 1-methy l-4,5-bis(4-chlorobenzoyl) cyclohexene and 4,4'-dichlorodiphenyl sulfone and 4-(3,5-dimethyl-4-hydroxyphenyl)-2,3-phthalazin-1-one.

用新型聚合单体 1-甲基-4，5-二(4-氯代苯甲酰基)环己烯与 4-(4-羟基苯基)-2 ，3-二氮杂萘-1-酮、4，4′-二氯二苯砜单体经亲核共缩聚反应，成功地合成了含环己烯结构的杂环联苯型聚醚系列聚合物。

Also made of polyether and cyclopentane Yingpao Xiangrong of the good.

另外制成的硬泡聚醚与环戊烷的相溶性较好。

Experiment results indicated that the foaming flowability of polymeric MDI was almost independent of 2,4'-MDI content in both CFC and cyclopentane foaming systems, but increase in 2,4'-MDI content resulted in linear rise of demoulding deform...

实验结果表明，当聚合MDI与 2种组合聚醚进行发泡时，2 ，4' MDI含量对聚合MDI的发泡流动性影响较小，而对后熟化性能的影响明显，随 2 ，4' MDI含量的增加，脱模变形呈直线上升的趋势。

In the process of producing soft urethane polyester foamed plasics,CFCs as forming agent are replaced by cyclopentane whose value of ozone depletion is zero to decrease the destruction of environment,and the modified poly-ether-alcohol is used as reactants through one-step reaction.

为了解决软质聚氨酯泡沫塑料生产过程中的环保问题，采用臭氧消耗值为零的环戊烷为物理发泡剂替代严重破坏臭氧层的氯氟烃，以改性聚醚多元醇与甲苯二异氰酸酯等为主要反应物，一步法反应研制试产了软质聚氨酯泡沫塑料。

METHODS: We measured the effect of various lidocaine infusionson the MAC of cyclopropane, halothane, isoflurane, and o-difluorobenzenein rats.

我们测定不同的利多卡因输注对于大鼠环丙烷、氟烷、异氟醚和邻二氟苯 MAC 的影响。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。