查询词典 acrylic acid

According to the properties of acrylic acid series polymer of scale inhibition. A kind of amphiprotic tercopolymer of acrylic acid, acrylamide and dimethyldiallylammonium chloride is synthesised, with water as solvent, persulfate and hypophosphate as initiator. Through the tests, the copolymer can show the good scale inhibiting effect and bactericidal action, and become a multifunctional scale inhibition.

本研究根据丙烯酸聚合物阻垢剂的特点，使用过硫酸铵(NH_4_2S_2O_8、次亚磷酸钠(Na_2PO_3)构成的氧化——还原型引发剂，水为溶剂，合成了新型可用于处理工业循环冷却水的丙烯酸—丙烯酰胺—二甲基二烯丙基氯化铵两性型三元共聚物。

Acrylic Resins are derived from methacrylic acid, acrylic acid or other related compounds, these substances are related to thermosetting plastic or thermoplastic.

丙烯酸树脂是来自甲基丙烯酸，丙烯酸或其他相关的化合物，这些物质都与热固性或热塑性塑料。

This result agrees well with the literature values of 23.5 and 22.0 kcal/mol obtained for the solution polymerization of partially neutralized acrylic acid (pH = 11) and undissociated acrylic acid(pH = 1), respectively.

这一结果也同意与文学价值的23.5和22.0千卡/摩尔获得的溶液聚合部分抵消丙烯酸（ pH值= 11 ）和undissociated聚丙烯酸（ pH值为1），分别。

The amido of Chitosan and thecarboxyl of acrylic acid made Chitosan-acrylic acid hydrogel pH-sensitive andion-sensitive.

壳聚糖的氨基，聚丙烯酸的羧基，使得壳聚糖-丙烯酸水凝胶具有pH和离子敏感性。

He best reaction conditions of TMAA were as follows: p-benzenediol as the polymerization inhibitor and the amount 1% of acrylic acid, reaction temperature 180 ℃,reaction time 3 h, raw material mass ratio of methyl eleostearate /acrylic acid 1:0.247 and the yield of TMAA was 85%.

MAA的最佳合成条件为：反应温度180℃，反应时间3 h，桐酸甲酯和丙烯酸的质量比为1：0.247，阻聚剂对苯二酚的加入量为丙烯酸质量的1%，产率为85%。

Acrylic acid and ester mainly is acrylic acid, methyl acrylate, ethyl acrylate, butyl acrylate, isobutyl acrylate, etc.

丙烯酸及酯主要是指丙烯酸、丙烯酸甲酯、乙酯、丁酯、异辛酯等。

The first synthetic route uses 1,2,4-trimethoxybenzene and chloroacetonitrile in forming 2,4,5-trimethoxy-a-chlor-acetophenone under the anhydrous condition, then the intermediate condensates with papaverine forming the core pyrro[2,l-a]isoquinoline, followed by formation and lactonization to form the lactone ring. The second synthetic route uses prepared aldehyde with prepared ethyl nitroacetate by Knoevenagel condensation to obtain 2-Nitro-3-(2,4,5-tris-methoxy-phenyl)-acrylic acid ethyl ester and 2-Nitro-3-(2,4,5-tris-benzyloxy -phenyl)-acrylic acid ethyl ester etal intermediates. The lamellarin skeleton could arise from condensation of the papaverine and these intermediates by Michael reaction, the ester group is provided for subsequent lactonization. The third synthetic route uses coumarin or indan-l,3-dione derivatives and papaverine to form lamellarin under basic conditions.

第一条路线首先从1，2，4-三甲氧基苯出发与卤乙腈作用合成卤代芳酮中间体，然后与罂粟碱反应合成开链片螺素，最后经乙酰化、去保护、成内酯环得到片螺素；第二条路线由制备的芳醛和制备的硝基乙酸乙酯经缩合得到2-硝基-3-芳基丙烯酸乙酯，然后由该中间体与罂粟碱反应，在完成关环的同时也引入酯基，最后去保护、成内酯环得到片螺素；第三条路线是由香豆素或茚二酮出发，经溴代后的中间体与罂粟碱反应，得到片螺素的基本框架。

Acrylic acid, starch and SPS were used as raw materials of solution polymerization to synthesize starch-g-acrylic acid superabsorbents interpenetrated with sodium PVA sulfate.

采用浓硫酸磺化法制备了聚乙烯醇硫酸钠；以丙烯酸、淀粉和SPS为原料采用水溶液聚合法合成了淀粉接枝丙烯酸－聚乙烯醇硫酸钠互穿网络高吸水性树脂。

Compared with the present process for the synthesis of acrylate by esterification of acrylic acid, which comes by oxygenation of propylene, the process by the carbonylation of acetylene to acrylic acid and its esters pays less cost, and so, is worth to be studied.

相对于目前主张的丙烯氧化法生产丙烯酸，再酯化生产丙烯酸酯的主流工艺，乙炔羰基化法合成丙烯酸及酯的工艺具有很好的经济性应用价值。

Terpolymer of acrylic acid/acrylic amide/malefic anhydride was synthesized and mixed with polyepoxysuccinic acid in order to improve the scale and corrosion performance of the latter in this study.

为了提高PESA的阻垢缓蚀性能，合成了丙烯酸／丙烯酰胺／马来酸酐三元共聚物，与聚环氧琥珀酸进行物理复配，考察了温度、反应物配比及浓度对复配产品阻垢和缓蚀性能的影响。

Nowadays, most of research are to build a transmutative Petri Nets through adding controlling place sets, controlling arc sets and controlling policy to the basic Petri Nets, while the Controlled Petri Nets could be used to argue many controlling theory problems conveniently and to induce many logically and physically supervisory and solve the Event Feedback Controlling Problems and State Feedback Controlling Problem in DEDS supervisory theory.

目前大多数的研究表现为在变形后的受控Petri网基础上，利用各种方法求得各种逻辑型、结构型控制器，解决DEDS监控理论中的事件反馈控制问题与状态反馈控制问题。

On one hand, there are discussions with the works council and union about extension of short time working up to the end of September.

一方面，有讨论，工程理事会和联盟关于延长工作时间短至9月底。