查询词典 vinyl

And the healing agent containing both multiply vinyl group and double SiH bonds was prepared by reducing the oligomer by lithium aluminum tetrahydride.,dichloropolymethylvinylsiloxane was prepared by hydrolyzing partially of MeViSiCl2 under nitrogen protected in ether.

甲基乙烯基二氯硅烷在氮气保护下，以乙醚为溶剂进行非充分水解，得到，二氯聚甲基乙烯基硅氧烷，再经过LiAlH4还原可得兼有多个乙烯基和两个SiH键的自修复单体。

A C-C bond type radical initiator i.e. 1,1,2,2-tetraphenyl-1,2-ethanediol and a S-S bond type thermal iniferter, i.e., tetraethyl thiuram disulfide were used to consist of new reverse ATRP initiation systems TPED/FeCl3/PPh3 and TD/FeCl3/PPh3, respectively."Living"/controlled polymerizations of a polar monomer MMA and a non-polar monomer St were investigated with the initiation systems as well as other new initiation systems; behavior of vinyl polymerization with a new asymmetrical C-C bond type thermal monomeric iniferter was studied also.

前者选用C-C键型的自由基聚合引发剂1，1，2，2-四苯基-1，2-乙二醇、S-S键型的热iniferter二硫化四乙基秋兰姆组成新引发体系TPED/FeCl3/PPh3、TD/FeCl3/PPh3，研究这些引发体系引发MMA、 St聚合的&活性&/控制聚合行为，同时研究一些其他新引发体系；后者合成了一种新的非对称C-C键型热引发转移终止剂，并研究其自由基聚合规律。

The effects of MMA and alumina trihydrate on properties of oligourethane methacrylate resins were investigated. And the curing reactivities of unsaturated polyester resin, vinyl ester and UM resin were compared by various methods.

研究了甲基丙烯酸甲酯和三水合氧化铝含量对聚氨酯甲基丙烯酸酯树脂性能的影响，比较了不饱和聚酯树脂、乙烯基树脂和UM树脂的固化反应活性。

In this work,the non\|aqueous carbonyl nickel slips were prepared by ball\|milling using Cyclohexanone\|butyl alcohol,Glycerol trioleate,Poly\|vinyl\|butyl and polyethylene glycol as the solvent,dispersant,binder and plasticizer,respectively.

本文以环己酮丁醇为溶剂，三油酸甘油酯为分散剂，以聚乙烯醇缩丁醛为粘结剂，聚乙烯乙二醇为增塑剂，通过球磨工艺制备了非水基羰基镍粉浆料。

Their half lives were 27.29 and 69.16 days respectively. Monocrotophos degraded into both methanol extractable and unextractable residues in the submerged soil.The analysis of 14C-methanol extractable. residue by TLC and ARG indicated that degraded products of monocrotophos were triether phosphate,;N-de-methyl Azodrin, O, O-dimethyl-vinyl-phosphatc,O-demethyl Azodrin,and O, C-demethyl Azodrin.The principal degraded extratable product of monocrotophos was triether phosphate, which incresed from 5% of the parent solution of monocrotophos to a range of 28-83%, furthermore and its degradation process was much faster in the unterilized soil than in the sterilized soil.

久效磷在淹水土壤中降解为甲醇可抽提态和不可抽提态残留物，对甲醇可抽提态残留物经TLC和红外光谱分析表明，其降解物为磷酸三酯、N-去甲基久效磷、O，O-二甲基乙烯基磷酸酯，0-去甲基久效磷，以及O，C-去甲基久效磷，但主要为磷酸三酯，其含量由母液中的5％增加到28—83％，这种降解过程，在未灭菌土壤中比在灭菌土壤中快。

After the graft reaction of ungelatinized starch, the morphology of the copolymers kept the aggregate structure of starch, and vinyl copolymer is grafted on its surface; while the gelatinized starch forms homogeneous polymer which is totally different with ungelatinized products.

结果表明，合成的淀粉接枝共聚物符合预期结构，未糊化的淀粉接枝后，聚合物保持团粒结构，表面接枝上了乙烯基均聚物；糊化的淀粉接枝后，形成了均匀的淀粉接枝共聚物。

The iPod was the product of imagination -- if you asked people in the days of vinyl and cassette tapes how they would like the distribution of recorded music improved, you would have received responses anchored to the Current State of the time: make records unscratchable; make cassettes that you don't have to turn over to play the other side.

因此，我们不知道自己需要什么。iPod是想象的产物——如果你在那些只有乙烯基和盒式录音带的岁月里向人们询问：你们打算怎样改善录制好的音乐唱片的销售？你听到的将是类似于现在情形的回答：让唱片不会被划掉；制作无需换面播放的盒式磁带。

The results showed that the addition leading to -2-phenyl-2-(2-vinylpiperidin-1-yl) ethanol 7 could proceed with good diastereoselectivity and excellent yield (95%).(3) The selective N-deprotection of -2-phenyl-2-(2-vinylpiperidin-1-yl) ethanol 2 without affecting the vinyl group in the substrate were untaken.(4) The Zip reaction for the transformation of -1-(3-aminopropyl)-3-methylazecan-2-one 8 to -7-Methyl-1, Sdiaza-cyclotetradecan-6-one 9 were undertaken. The results showed that, under controlled conditions, acceptable yields (43%) could be achieved and racemization can be minimized during the ring expansion reaction.

该合成路线与文献方法相比，反应条件较温和，也缩短了反应时间；(2)哌啶衍生物2与乙烯基格氏试剂进行加成反应的条件和立体选择性，取得了较好的结果（差向异构体比为80：20，产率95％左右）；(3)不饱和哌啶衍生物7在不影响碳碳双键的情况下去除苯基甘氨醇手性辅助基的条件；(4)具有羰基α位手性的氨基酰胺8在不同条件下经Zip重排反应转变为9的反应，控制反应条件，可使反应中消旋化减小到最小的程度。

Lead is also used in some ceramic and vino vinyl products, candles, hair coloring and other goods.

铅也被用于制造陶瓷和乙烯基产品、蜡烛、染发剂和其他产品。

The sublimation mechanism is that the reaction product vinyl acetate acts with Zn2 to produce a volatilizable complex,then sublimates to gas phase.

升华机理是反应产物与Zn2作用生成挥发性络合物再升华到气相中去。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。