查询词典 MAA

By using the OP-10/JFC/ amyl alcohol non-ionic compound emulsifier as stabilizer, about 12% organosilicon was appended after the pre-polymerzation of MA, n-BMA, and MAA acrylate monomer was performed and the temperature was decreased to 62℃, and then the pH value was controlled in 7~8 after the polymerization.

结果表明，以OP-10聚醚渗透剂JFC/戊醇非离子复合乳化剂为稳定剂，在MA、n-BMA、MAA丙烯酸酯单体形成预聚体后降温至62℃，加入12%左右的有机硅单体，反应结束后控制pH值7~8，微乳液具有良好的稳定性，乳胶粒具有翻转型的核－壳结构。

By the research of chitosan and MAA grafting copolymerization, influencing rules of reaction conditions were discussed.

通过对壳聚糖与MAA接枝反应的研究，得出不同反应条件对接枝反应的影响规律。

Date palms and reeds form a lush fringe along a finger of Umm al Maa Lake in the Ubari Sand Sea.

枣椰树和芦苇沿着奥巴里沙海里的Umm al Maa湖边缘形成茂盛的圈。

Methacrylic Acid is one of the most important organic materials, and there is large demand indomestic and international market. The traditional preparation method of MAA has lots of limitation suchas high cost, huge pollution, and virulent raw materials. So its necessary to search a new green route toreplace the ACH route.

甲基丙烯酸是一种重要的有机化工原料，目前国内外对MAA的需求量很大，而传统的丙酮氰醇法制备MAA存在成本高、环境污染大、原料剧毒等缺点，所以需要寻找一条新的绿色工艺路线代替传统工艺。

The research of the thesis can be divided into four parts:Part one. The cheap raw materials, such as soluble glass, HCl, MAA were used as reactant. A aggregation SiO2 powder with network-type was prepared by controlling the ratio of material, temperature, time, mixing speed, which has smaller size than that of products sold in the market.

本论文研究工作分为四个部分：第一部分：采用价廉的水玻璃和HCL、MAA、CO2酸化体系为原料，通过材料配比、制备温度、时间、搅拌速度等工艺条件的研究，制备出比市场上销售的二氧化硅粒径更小的呈网络附聚体形态的SiO2粉体。

The results show that the foamable MAA/MAN copolymers were prepared at 40-60℃ by polymerizing the mixture of 50phr MAA, 50phr MAN, 1-5phr magnesium oxide, 2-8phr butanol and tert-butanol, 0.2-0.3 phr dibenzoyl peroxide and tert-butyl perbenzoate and 0.1-0.2phr DMF. Then the resulting copolymers were expanded at 200-220℃ for 2-3h, subsequently treated at 160℃ for 5-6h, generating PMI foams with excellent mechanical properties and heat-resistance.

研究结果表明：将50份MAA、50份MAN、1~5份氧化镁、2~8份正丁醇、叔丁醇的混合物、0.2~0.3份过氧化二苯甲酰和过氧化苯甲酸叔丁酯和0.1~0.2份的甲酰胺，混合均匀后在40~60℃聚合为可发泡的MAA/MAN共聚物，该共聚物在200~220℃下发泡2~3h，在160℃下热处理5~6h，制得PMI泡沫塑料，其力学性能和耐热性能优异。

The results showed that when 0.3 g of divinyl benzene was used as crosslinking agent, the crosslinking degree increased significantly from 28.26% to 90.95% with the increase of MAA amount from 4.0 mol% to 10.0 mol%, and this increase became slowly as MAA amount was more than 10.0 mol%; the particle volume expansion was increased gradually as MAA amount increased, and reached a maximum of 42.1% when 12.0 mol% of MAA was used, and perfect porous morphology inside particles was observed even when the crosslinking degree reached 95.4% at 14.0 mol% of MAA.

结果表明：在交联剂二乙烯基苯用量一定(0.3 g)的条件下，随着MAA用量从4.0 mol%增加到 10.0 mol%，聚合物交联程度从28.26%迅速增大至90.95%，当其用量超过10.0 mol%后 P x增大趋势变缓；随着MAA用量的增加，处理后胶粒体积膨胀百分率逐渐增大，在MAA用量为12.0 mol%时Δ V 达到42.1%的最大值，当MAA用量增大到14.0 mol%时，尽管 P x高达95.44%，胶粒仍具有完好的孔状结构。

Methods 21 LEPP patients with clinical highly suspected acute pulmonary embolism underwent (superscript 99m)Tc-MAA veins imaging and pulmonary perfusion imaging. Vena caval filters were inserted and thrombolysis were given in patients with big area APE and/or iliofemoral vein thrombosis indicated by (superscript 99m)Tc-MAA imaging. Thrombolysis was given in patients with small area APE and/or subpopliteal vein thrombosis.

对21例LEPP临床高度疑为急性肺栓塞患者行，(上标 99m)Tc-MAA下肢深静脉显像、肺血流灌注显像，(上标 99m)Tc-MAA显像提示大面积APE和／或髂股深静脉血检患者行下腔静脉滤网放置+溶栓治疗，小面积APE和／或腘静脉以下DVT单纯溶栓治疗，治疗2~4周后复查PPI。

The results indicated that the thermo-stability of the polymers derived from BOEMA was not as good as those derived from TBMA, and the more content of MAA in the compolymers resulted in lower stability. Terpolymer from BOEMA, MAA and St had higher thermo-stability than those from BOEMA, MAA and isobornyl methacrylate or methyl methacrylate.

当树脂中MAA含量较低时，BOEMA与St的共聚物和BOEMA与IBOMA或MMA的共聚树脂相比，表现出更好的热稳定性，分解温度有明显差异(相差30度以上)；另外，湿度对BOEMA的聚合物的稳定性也有很大影响，湿度越高，树脂分解越快。

The amount and size of ZnS was larger when the proportion of MAA was higher in the copolymer.

MAA用量高的共聚物纤维表面形成的ZnS量与粒子尺寸较大，MAA用量为10 wt。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失