an unsaturated acid (C4H6O2) used to make resins and plastics

acrylonitrile (an)/ methacrylic acid (maa) copolymer foam plastic was prepared by two-step production.

本论文以二步法制备了丙烯腈（an）/甲基丙烯酸（maa）共聚物泡沫塑料。

the present invention, thereby, provides a novel heteropoly acid catalyst having excellent methacrolein conversion rate, methacrylic acid selectivity and yield.

因此，本发明提供了一种具有优异的异 丁烯醛转化率、甲基丙烯酸选择性和产率的新型杂多酸催化剂。

this paper introduces the synthesis method and application of 2,4,6-tribromophenyl methacrylic acid ester.

文献名称2，4，6，-三溴苯基甲基丙烯酸酯的合成及应用。

methacrylic acid dodecyl ester;

甲基丙烯酸十二酯；

methods:silica gel tube adsorption and solvent desorption were used for sampling of methacrylic acid and analysis was performed by hplc.

方法：以硅胶管采集空气中甲基丙烯酸，用甲醇解吸后高效液相色谱测定。

in this paper, polyglycol methyl ether methacrylate was manufactured through the esterification by using methacrylic acid and polyglycol with the molecular weight 1000 at 75~100℃.

本文以聚乙二醇1000与甲基丙烯酸为酯化反应的原材料，在温度75～100℃之间，通过酯化反应生成聚乙二醇单甲基丙烯酸酯。

in the invention, at first, a multi-polymer is obtained by polymerizing the latexes of a methacrylic acid n-butyl acetate monomer and a styrene monomer of different proportions;

本发明首先通过不同比例的甲基丙烯酸正丁酯单体和苯乙烯单体的乳液聚合得到共聚物；

a kind of crosslinking modified organic glass was prepared by mold copolymerization of methyl methacrylate, styrene, methacrylic acid with divinylbenzene as crosslinking agent.

以二乙烯基苯为交联剂，由甲基丙烯酸甲酯、苯乙烯、甲基丙烯酸模型浇铸共聚，制得了一种交联型改性有机玻璃。

a novel fluorine-containing epoxy vinyl ester resin (f-ever) was synthesized using fluorine-containing epoxy (f-ep), acrylic acid (aa) and methacrylic acid (maa) as monomer.

以含氟环氧树脂（f-ep）、丙烯酸（aa）和甲基丙烯酸（maa）为单体，用顺丁烯二酸（ma）进行改性，合成了含氟环氧乙烯基酯树脂（f-ever）。

main factors affecting the graft modification of acrylic acid and methacrylic acid onto melt - blown polypropylene nonwovens initiated by benzoyl peroxide are studied.

研究用过氧化苯甲酸引发丙烯酸和甲基丙烯酸接枝熔喷聚丙烯非织造布的主要影响因素。

enteric acrylic acid resin for drug delivery was prepared by the solution polymerization with methacrylic acid and methyl methacrylate as raw materials and potassium persulfate as initiator.

以甲基丙烯酸与甲基丙烯酸甲酯为原料， 过硫酸钾为引发剂，经溶液聚合制备出药用肠溶性丙烯酸树脂。考察了物料配比、反应温度、 溶剂浓度、引发剂用量对反应的影响。

butyl methacrylate was synthesized from methacrylic acid and n-butyl alcohol with esterification reactions by the catalytic activey of cerous nitrate.

以甲基丙烯酸和正丁醇为原料，硝酸亚铈为催化剂，合成了甲基丙烯酸丁酯。

acylation activity of hydroxyl groups in methyl cholicate has been determined by the use of methacryloyl chloride, methacryloyl anhydride and methacrylic acid as the acylating agents.

以甲基丙烯酰氯、基丙烯酸酐和甲基丙烯酸作酰化剂，研究了胆酸甲酯分子中羟基的反应活性。

the thermal stability, char yield and flame retardancy have been obviously improved by grafting acrylic or methacrylic acid or their sodium salts into abs or sbs.

将丙烯酸或甲基丙烯酸及它们的钠盐接枝到某些abs和sbs上，可明显提高接枝共聚物的热稳定性、成炭率及阻燃性。

the present invention relates to a heteropoly acid catalyst which is used for the production of methacrylic acid by gas phase oxidation of methacrolein and a preparing method thereof.

本发明涉及一种用于通过异丁烯醛的气相氧化制备甲基丙烯酸的杂多酸催化剂及其制备方法。