查询词典 allyl

At present,the main methods to produce epichlorohydrin chlorination are through allyl chloride route at high temperature or allyl alcohol route.

目前，世界上环氧氯丙烷工业的生产方法有两种：氯丙烯高温氯化法和烯丙醇法。

The resin was used as a selective oxidant for oxidation of allyl alcohol to allyl aldehyde.

合成了铬酸氢根季铵盐树脂，以它作为一种选择性氧化剂应用于烯丙醇的氧化反应，考察了温度、时间、溶剂、树脂与醇的物料比对氧化反应的影响。

Allyl glycidyl ether was synthesized from allyl alcohol and epichlorohydrin by phase transfer catalysis.

以烯丙醇和环氧氯丙烷为原料，采用相转移催化法，合成了烯丙基缩水甘油醚。

Allyl alcohol was used for preparation methacrylate photosensitive polymer with allyl in side chain.The structure of product was confirmed by FTIR and 1HNMR spectroscopy,and the molecular weight of the terpolym...

用FT-IR和1HNMR图谱确认了结构，用凝胶色谱测定其相对分子质量，并从引发剂浓度、聚合温度、单体配比等方面进行讨论，同时对其光刻性能进行了研究。

A new method for synthesizing rosin allyl alcohol ester was studied. p-Toluenesulfonic acid allyl alcohol ester was first synthesized by O-acylation of allyl alcohol with p-toluene sulfonyl chloride, using NaOH as catalyst. Then rosin allyl alcohol ester was synthesized from sodium resinate and p-toluenesulfonic acid allyl alcohol ester.

探索了一种两步合成松香烯丙醇酯的新方法，即先以烯丙醇和时甲苯磺酰氯为原料，以NaOH为催化剂，通过O-酰化反应合成中间体对甲笨磺酸烯丙醇酯，再与松香钠皂发生亲核取代反应合成目标产物松香烯丙醇酯。

The results of in situ DRIFTS on propylene oxidation show that the allyl species originated from α-H abstraction of propylene were located at the wavenumbers of 1454 cm~(-1) and 1427 cm~(-1). The rate-determining step is the abstraction of an α-H abstraction from a lattice oxygen linked to a bismuth ion to form a π-allyl intermediate coordinated to a molybdenum ion. The metal-oxo group then attacks the allyl intermediate forming a σ-bonded oxygen-allyl species, which is in a rapid equilibrium with the π- bonded species. The σ-bonded species then transforms to acrolein by further abstraction of α-H. Such species as formate, carboxylate, carbonate transform to deep oxidation products. The acetone was derived from propylene by an enolic species at lower temperatures.

丙烯氧化反应体系的原位漫反射红外光谱研究结果表明，由丙烯脱氢生成的烯丙基中间物种吸收峰在1454cm~(-1)和1427cm~(-1)处；基于此提出了较完整的丙烯氧化反应网络：丙烯选择氧化生成丙烯醛主要经历丙烯脱除甲基上的一个H，生成烯丙基物种，该物种嵌氧生成σ-O络合物，脱氢得到丙烯醛前驱体，脱附生成丙烯醛；完全氧化产物是由催化剂表面上生成甲酸盐、羧酸盐、碳酸盐等形式的中间物种转化而成；较低反应温度下丙烯氧化生成丙酮，通过烯醇式中间物种氧化生成丙酮前驱体得到。

Ti-MWW exhibited a conversion of 97% for allyl aolcohol and a selectivety of above 99% for glycidol when the allyl aolcohol epoxidation was carried out at 333K for 30 min with Ti-MWW of 0.05g, allyl aolcohol of 10mmol and H2O of 20ml.

当Ti-MWW 用量0.05g，水加入量20ml，烯丙醇加入量10mmol，在333K 下反应30min，烯丙醇的转化率达到97%，对缩水甘油选择性达到99%以上。

The effect of impurities in DMDAAC monomer solution, such as NaCl, allyl chloride, allyl alcohol, allyl aldehyde, active carbon, low molecular polymer of DMDAAC, yellow residua, Fe~(3+), Fe~(2+), Cu~(2+), on the polymerization reactivity of preparing PDA with 30％cationicty was researched in this paper.

本文研究了二甲基二烯丙基氯化铵单体溶液中氯化钠、烯丙基氯、烯丙醇、烯丙醛、活性炭、低分子聚合物、黄色物质、Fe~(3+)、Fe~(2+)、Cu~(2+)等杂质对合成阳离子度为30％PDA的聚合反应性能的影响。

The polymerization of preparing PDA could be impacted by allyl chloride, allyl alcohol and allyl aldehyde. The content of allyl chloride, allyl alcohol and allyl aldehyde in the DMDAAC monomer solution varied from 0mg/kg to 1000mg/kg, their intrinsic viscosity of PDA descended from 10.3dL/g to 8.0dL/g, 6.8dL/g and 8.8dL/g respectively. The polymerization of preparing PDA could be carried out well in the case the content of NaCl, active carbon, yellow residua and low molecular polymer of DMDAAC were less than 10000mg/kg, 1000mg/kg, 1000mg/kg and 50000mg/kg respectively.

单一杂质含量变化对聚合产物PDA特征粘度影响的研究结果表明：在DMDAAC单体溶液聚合反应过程中，当Fe~(3+)、Fe~(2+)和Cu~(2+)含量分别达到7mg／kg、9mg／kg和5mg／kg时无法得到聚合产物PDA胶体；当烯丙基氯、烯丙醇、烯丙醛含量分别从0mg／kg增加到1000mg／kg时，聚合产物PDA的特征粘度从10.3dL／g分别下降到8.0dL／g，6.8dL／g和8.8dL／g；活性炭和黄色物质含量在1000mg／kg以下，低聚物含量在50000mg／kg以下以及氯化钠含量在10000mg／kg以下时产物PDA的特征粘度降低变化量不超过0.2dL／g。

Allyl starch was prepared by etherification pretreatment of introducing allyl groups onto starch, and then AS-g-PMA was synthesized through graft copolymerization between allyl starch and methyl acrylate. The adhesion to fibers, sizing film and sizing performance of the blended size composed of AS-g-PMA and PVA-1799 were investigated. And the possibility by using AS-g-PMA to substitute PVA component was studied by contrast experiments.

摘〓要：通过烯丙基化变性对淀粉进行预处理制取烯丙基淀粉，再与丙烯酸甲酯进行接枝共聚合成接枝淀粉，文章探索了这种接枝淀粉与PVA1799混合浆的黏附、浆膜及浆纱性能，与目标配方进行比较，揭示出AS-g-PMA取代PVA的可能性。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。