查询词典 methacrylate

A porous copolymer of acrylamide has been prepared by suspension copolymerization of methylacrylate,methyl methacrylate and vinyl acetate in the presence of porogenic and crosslinking agent,followed by a aminate process.

以聚醋酸乙烯为致孔剂，在交联剂和引发存在下，合成了丙烯酸甲酯—甲基丙烯酸甲酯—醋酸乙烯共聚物，经胺解制得了多孔聚丙烯酰胺共聚物—APM载体。

Hrough copolymerization of styrene with few quantity of methacrylic acid, maleic anhydrate or 4-vinyl pyridine respectively and of butyl methacrylate with maleic anhydrate, the functional groups carboxyl, simple anhydride and pyridyl have been introduced respectively to the chain of PS or PBma.

通过苯乙烯与少量的甲基丙烯酸、马来酸酐或4—乙烯基吡啶的共聚及甲基丙烯酸正丁酯与马来酸酐的共聚，可在聚苯乙烯及聚甲基丙烯酸丁酯链上分别引入功能基因羧基、酸酐基和吡啶基对共聚物进行了红外光谱、酸碱滴定、元素分析、玻璃化转变温度、粘度及紫外光谱的测定。

Polyurethane hybrid emulsion modified by caster oil and arylate was synthesized with toluene diisocyanate, polycaprolactone glycol (PCL22ON), castor oil, and methyl methacrylate.

以聚醚多元醇(N22O)、甲苯二异氰酸酯(TDI-80)、蓖麻油(C.0)、甲基丙烯酸甲酯为主要原料，合成了蓖麻油改性的水性聚氨酯复合乳液。

The multi monomer of methyl methacrylate/styrene melt grafting onto atactic polypropylene was studied.

对多单体甲基丙烯酸甲酯和苯乙烯熔融接枝无规聚丙烯进行了研究。

An acrylic resin was synthesized by the radical copolymerization with methyl methacrylate, butyl acrylate and methacrylic acid monomers in solution using benzoperoxide as initiator. Appropriate parameters of monomer ratio, monomer concentration, solvent, and reaction temperature were found by experiment.

以过氧化二苯甲酰为引发剂，采用溶液聚合合成了甲基丙烯酸甲酯-丙烯酸丁酯-甲基丙烯酸树脂，通过实验确定了自由基共聚合适宜的单体配比、单体浓度、引发剂浓度、溶剂以及反应的升温速度。

It was found that both the conversion and the initiating efficiency of methyl methacrylate polymerization system were decreased in the presence of small amounts of addition inhibitions 2,4,6-trinitrophenol or Benzoquinone, the system exhibited some retardation characteristics; at the same time, the molecular weights of obtained polymers was small and the molecular weight distributions was narrow, it was suggested that this polymerization system exhibited some ""living""/controlled radical polymerization characteristics.

发现在甲基丙烯酸甲酯的普通自由基聚合体系中加入少量的加成型阻聚剂2，4，6-三硝基苯酚或1，4-苯醌时，体系转化率降低，引发效率降低，呈现出一定的缓聚性质：同时得到的聚合物分子量变小，分子量分布变窄，具有一定的&活性&/可控的特征。

The asymmetric polymerization of methyl methacrylate is carried out using the chiral binaphthyl crown ether macrocyclic compounds binding n-BuLi or t-BuOK as chiral initiator at -78℃.

以手性联萘冠醚为配体，络合n-BuLi，t-BuOK等有机金属化合物形成手性引发剂体系，初步探讨了甲基丙烯酸甲酯单体的聚合反应。

Or FR4 PCB, bromide exsited mainly in pyrolysis gas and gas products mainly consisted of CO, CO2, propylene, 2-methacrylate, bromomethane, and a small amount of acetone, C1-C3 halogenation alkyls. The pyrolysis gas could be reclaimed as fules after debromide treatment. Pyrolysis liquid products consisted of 8.333% water and 91.667% oil component.

R4板中溴元素主要存在于气体产物中，气体产物主要为CO、CO2、丙烯、2-甲基丙烯、溴甲烷以及其他小分子烯烷烃产物，气体产物可通过除溴无害化处理作可燃气回收；液体产物中含有8.333%的水和油质成分。

Butoxy ethyl methacrylate and the polymers derived from it were also synthesized. The thermo-stability of the polymers was examined.

结果表明：BOEMA的共聚物的热稳定性稍差，并随树脂中MAA含量的增多而热稳定性下降。

The high oil-absorbing resin made of crosslinked copolymer of wood fibre and cetyl methacrylate was prepared by suspension polymerization method.

采用悬浮聚合法合成了木浆纤维素交联聚合复合高吸油性材料，测定了所制备的复合高吸油性材料吸油性能指标。

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。