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The structure and the properties of poly/poly interpenetrating polymer network hydrogels were studied theoreticallyand experimentally in this dissertation.

本文对聚丙烯酸/聚乙烯醇互穿聚合物网络水凝胶的结构和性能进行了系统理论的研究。

Water borne paints like acrylic lacquers dry by evaporation of the solvent - be it water based solvent.

如同丙烯酸漆一样,水性涂料的干燥也通过树脂溶剂的蒸发来实现。

Copper nanoparticles were modified by surface modifier, methyl - methylacrylate, and minified by use of fluid-flow comminuted method, the disper sity and dispersion stability of the modified copper nanoparticles as additive i n CD 15W/40 engine oil were evaluated by high velocity centrifuger; its morpholo gy and particle size were tested by TEM and XRD analysis; and its tribological p roperty in CD 15W/40 engine oil was investigated by ball on pan tribo-tester.

采用化学改性法与液流粉碎机械法对纳米铜微粒进行了表面改性和分散研究,采用高速离心机考察了表面改性后纳米铜微粒作为添加剂在CD15W/40柴油机油中的分散性及分散稳定性,采用TEM、XRD测试了表面改性纳米铜微粒的形貌及粒径大小,采用球盘磨损试验机考察了表面改性纳米铜微粒作为CD15W/40全配方调配油添加剂的摩擦学性能,用SEM、EDS观察了磨损表面的形貌、线扫描、面分布及元素含量,分析了纳米铜微粒在摩擦过程中的减摩润滑机理。结果表明:甲基丙烯酸甲酯化学改性结合液流粉碎方法处理后纳米铜微粒的粒径进一步均匀、细化,平均粒径为24nm,并在CD15W/40油中分散性好,悬浮稳定时间长。

The results show that if we choose right surgical method (completely obturated technology), good lens (dealing with hydrophobicity acrylate and heparin) and special shape design, we can reduce or avoid the occurrence of capsular opacification to the greatest extent.

选择适宜的手术方法、优良的人工晶状体材质(疏水性丙烯酸酯和肝素处理)、特殊的形态设计就能最大程度的减少或避免后囊膜混浊的发生。

When there were two kinds of active sites with different properties, isobutene were formed on one kind of active site, and then, spilled over to the other active sites, reacting to MAL, isobutene forming as the final product was restrained, and the oxygenates yield was increased.

当催化剂表面存在相邻的两种化学性质不同活性位时,异丁烷在一种活性位上生成异丁烯后,异丁烯可能在催化剂表面迁移到另一种活性位上,继续反应生成甲基丙烯醛或甲基丙烯酸,这抑制了异丁烯作为产物从反应器中流出,并提高含氧有机物收率。

BACKGROUND: The application of polymerized 2-hydroxyethyl methacryate in many organs of living body shows good biocompatibility.

背景:聚甲基丙烯酸β羟乙酯水凝胶在生物体多器官的应用显示了良好的生物相容性。

PAA/PVA IPN hydrogels were prepared by a sequential method by which acrylic acid firstly. polymerizes and cross-links in PVA/water solution with UV irradiation,then PVA physical cross-linked hydrogels are formed in cross-linked PAA networksby freezing-thawing. The orthogonal test design method was used to optimize theexperimental conditions based on the mechanical and swelling properties of thehydrogels. The effect of the PAA and crosslinking agent contents on the microscopicmorphology of the PAA/PVA IPN xerogel was investigated by transmission electronmicroscopy, and on the mechanical properties of the hydogels was studied bymeasurements of mechanical properties.

针对水凝胶强度、生物相容性和刺激响应性的需要,选择了以PVA和PAA为复合水凝胶的基本分子结构;采用顺序IPN方法制备PAA/PVA IPN水凝胶,即将单体丙烯酸与PVA溶液共混,AA经紫外光辐射聚合交联在PVA溶液中形成PAA化学交联网络,再经冰冻—解冻循环过程在PAA网络内形成PVA物理交联网络。

In order to study the mechanism of macromolecule deterring propellant on changing burning law,the polymerizing conditions,mechanical and thermal decomposition performance of coating-layer is studied.

通过改变聚合方式、温度、时间、引发剂、聚合界面的方法,探讨了涂覆层的聚合工艺;通过材料试验机试验和热分解试验,研究了聚二甲基丙烯酸乙二醇酯涂覆层在不同温度下的力学性能及其热分解规律。

Step procedure. Firstly, glycidyl rnethacrylate was photo梘rafted onto the surface of PVC without degassing. An activated surface with active epoxy groups was formed. The grafted polymer can also act as the spacer between heparin and PVC; Secondly, heparin is attached to the grafted surface through its functional groups reacted with the epoxy groups.

第一步,通过紫外光接枝反应将甲基丙烯酸缩水甘油酯接枝到PVC材料表面,接枝链作为肝素和聚氯乙烯材料之间连接的间隔基,同时也得到了带有环氧基团的反应性表面;第二步,通过肝素分子所带功能基团与PVC材料接枝表面上的环氧基之间的反应将肝素共价键合到PVC材料表面。

Refinishing should be done by trained craftsmen as they use a special chemical called Aliphatic Acrylic Polyurethane Enamel.

修补工作应由训练有素的技工,他们采用一种特殊的化学名为脂肪丙烯酸聚氨酯搪瓷。

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I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里,举止就文雅一些,因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计,这件高贵的制服是香港本土制造,是我们第一套不配帽子的制服。

Do not 'inflate' your achievements and/or qualifications or skills .

不要 '夸大' 你的业绩或成果,条件或者技能。