丙烯酸

The family of clear , colour and translucent thermo – plastic resins such as Plexiglas or Lucite, Perspec.

透明的、色彩的和半透明的热塑料性塑料树脂及其同系物，例如Plexiglas或Lucite，Perspec。2－甲基丙烯酸树脂。

Hydroxy-2,3-dihydro-4-quinolone is synthesized by the basic material of 4-nitrochloro-benzene. It has investigated the routes, conditions and purifies methods in this paper, which provides bases to lucubration and industrialization. This study belongs to the field of medical intermediates.

本文以4-硝基氯苯和丙烯酸为基础原料合成6-羟基-2，3-二氢-4-喹啉酮，并对6-羟基-2，3-二氢-4-喹啉酮的合成条件和纯化方法进行了实验研究，为后续的深入研究和工业化生产提供依据。

According to a Material Safety Data Sheet published by Elmers Products, Inc. this material includes an acrylic binding resin and 5 to 10% by weight magnesium carbonate, 50 to 70% limestone, 1 to 5% chlorite, 1 to 5% kaolin, 1 to 5% calcite, 5 to 10% talc and 0.1 to 0.99% quartz.

根据材料安全数据表Elmers出版的产品，公司这种材料包括丙烯酸树脂和具有约束力的5至10 ％的重量碳酸镁， 50至70 ％，石灰石， 1至5％，绿泥石， 1至5 ％高岭土， 1至5％，方解石， 5至10 ％，滑石粉和0.1至0.99 ％石英。

A steel bar is washed and dried, and then put into a glass pipe which is sealed to obtain stirring magneton; a mixed solvent of Gamma-methacrylate oxide propyl trimethoxy silane and methanol is prepared and added with an organic base to obtain a pre-bonding solvent; the stirring magneton is immerged into the pre-bounding solvent, and the outer surface of the glass pipe of the stirring magneton is bonded with a layer of silane substance with alkenyl; a reactive monomer mixture and a pore-forming agent mixed solvent are evenly mixed and then added into a container, the stirring magneton after the pre-bounding is put into the container which is sealed and then put into a water bath; after reaction, the container is removed, the stirring magneton coated with a polymer is taken out and put into a extractor and extracted by using a solvent; or the stir bar is immersed into the solvent till no impurity can be checked in the solvent, thereby obtaining the product.

将铁条清洗干燥，放入玻璃管内，密封得搅拌磁子；配制γ-甲基丙烯酸氧丙基三甲氧基硅烷与甲醇的混合溶液，加入有机碱得预键合溶液，将搅拌磁子浸入预键合溶液，在搅拌磁子的玻璃管外壁键合一层带烯基的硅烷化物质；将反应单体混合剂和致孔剂混合溶液混匀后倒入容器中，将预键合后的搅拌磁子放入容器，密封后置于水浴中，反应后除去容器，取出涂有聚合物的搅拌磁子，置于提取器中，以溶剂提取，或将搅拌棒置于溶剂中浸泡至溶剂中无杂质检出，得产物。

In the paper the effects and main differences of maleic anhydride and acrylic acid in the synthesis of polycarboxylate superplasticizers are analyzed according to their respective characteristics and technical requirements for synthesis.

根据马来酸酐与丙烯酸各自的特性和聚羧酸盐减水剂合成的技术要求，分析了它们在合成过程中的作用和主要差别，并概述了马来酸酐在合成中的应用情况，最后提出了马来酸酐在合成中应用的几点建议。

Next, the proximal 10 cm of the femur was stripped of all soft tissues, and the marrow cavity was packed with polymethylmethacrylate.

接下来，剥离肌骨近端10cm的所有软组织，髓腔用聚甲基丙烯酸甲酯填充。

Using a coated urea (Polyolefin-coated urea, 70 day, POCU) made in Japan and a conventional granular urea as check nitrogen release characteristics of four kinds urea amended with biological inhibitor and coated or coated by acrylic resin fertilizers in Meadow Brown Soil are examined under constant temperature incubating in laboratory.

在室内恒温培养条件下，以日本70 d聚烯烃包膜尿素和大颗粒尿素为对照，研究4种丙烯酸树脂包膜及其与生化抑制剂结合尿素肥料在土壤中尿素态氮溶出与水解特征，以确定不同种MMA包膜尿素在土壤中缓/控释效果与尿素转化机理。

The research indicated that under the compound use of hydroquinone and methyl quinone or independent use of phenothiazines or nitrogen oxygen free radical made the polymerization retarder, opposite-methyl-phenylsulfon made the esterification catalyst, toluol made the backflow including water condition, the acid mellowly compared to when it was 1.15, the production rate of the synthesis methylacrylic acid polyethylene glycol single methyl ether (400) ester may achieve 98.9%, was extremely similar to the overseas product functional group structure.

研究表明，在氢醌、甲醌复合使用或者单独使用吩噻嗪、氮氧自由基哌啶酮作阻聚剂，对甲苯磺酸作酯化催化剂、甲苯作回流带水的条件下、酸醇比为1.5时，合成的甲基丙烯酸聚乙二醇单甲醚(400)酯产率可以达到98.9%，与国外产品官能团结构十分相似。

The meniscus lens 202 may be manufactured from, e.g., BK7, B270, SF10, SF57 or F2 glass, sapphire, plastic, acrylic, silicone, epoxy, or any other suitable material capable.

弯月透镜202可由BK7、B270、SF10、F57或F2玻璃、蓝宝石、塑料、丙烯酸、硅酮、环氧树脂或任何其它可以的适当材料制造。

The bulk photopolymerization of methyl methacrylate at 30℃ was studied.

本文研究了甲基丙烯酸甲酯在30℃时的光引发聚合。

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。