查询词典 acrylic resins

Seven macroporous adsorption resins were compared on their adsorption properties for total saponins from Helleborus thibetanus,and the LSA-30 type resin possessed the better adsorption ability.

对7种大孔吸附树脂的铁筷子总皂苷吸附性能进行了比较筛选试验，并对选定的树脂进行了吸附与解吸优化条件研究。

Good thermal stability and self-extinguishing behavior was observed with the cured polybenzoxazine resins. Second, furan-containing benzoxazine monomers, P-FBz, BPA-FBz, and 4FP-FBz were prepared using furfurylamine as a raw material. Formation of furfurylamine Mannich bridge networks in the polymerizations of P-FBz and BPA-FBz increased the cross-linking densities and thermal stability of the resulting polybenzoxazines. P-FBz and BPA-FBz- based polymers also exhibited high glass transition temperatures above 300℃, high char yields, and low flammability with a limited oxygen index value of 31. The dielectric (Dk3.21–3.39) and mechanical properties (high storage modulus of 3.0–3.9 GPa and low coefficient of thermal expansion of 37.7– 45.4 ppm) of the P-FBz and BPA-FBz-based polymers were superior or comparable to other polybenzoxazines. 4FP-FBz used for polybenzo- xazine modification by means of formation of benzoxazine hybridation with P-FBz.

第二部份以2-呋喃甲胺为起始物，制备了P-FBz、4FP-FBz与BPA-FBz 三个含呋喃官能基之氧代氮代苯并环己烷的单体；BPA-FBz与P-FBz於开环聚合中形成之Mannich bridge网状结构有效地提升聚氧代氮代苯并环己烷聚合物之交联密度与热安定性；Poly与Poly具有大於300℃之玻璃转移温度、高的焦炭生成率与具有31之极限氧指数(Limited oxygen index， LOI)的难燃性特质，Poly与Poly之介电常数(Dk=3.21~3.39)与机械性质[3.0~3.9 GPa的储存模数与37.7~45.4ppm之低热膨胀系数( Low coefficient of thermal expansion， Low CTE)]均较其他聚氧代氮代苯并环己烷为优；4FP-FBz具有低之介电常数(Dk=2.7)，以其作为降低介电常数之反应型改质剂，与P-FBz混成，证实可有效地降低Poly的介电常数。

Now the water as solvent adhesives, innoxious, nuisanceless, fire, but this is limited to ofmaize host materials can distribute a wide range of polymer resins, and polymer-coated plastic film, equipment, and so on are demanding, stability of less than ideal.

现已开发出以水为溶剂的粘合剂，其无毒、无公害、不燃烧，但这种粘合剂主体材料只限于能在水中分散的各类高分子树脂，而且对塑料薄膜、覆膜设备等均要求较高，粘合性能的稳定性不太理想。

The features of molecular structure of aromatics, resins and asphaltenes were investigated by ruthenium-ion-catalyzed oxidation, where involatile acid products were methylated with excess diazomethaneether and volatile acids were esterified with phenacyl bromide.

利用钌离子催化氧化方法对大港减压渣油芳香分、胶质和庚烷沥青质进行了选择性降解，通过GC、GC-MS等分析手段对降解反应产物中一元正构脂肪酸、α，ω-二元正构脂肪酸和苯二～六元羧酸的含量和分布分别进行了定量分析。

A chromium free conversion coating at least equivalent in corrosion protective quality to conventional chromate conversion coatings can be formed on metals, particularly cold rolled steel, by a dry-in-place aqueous acidic liquid comprising: a component of anions, each of said anions consisting of at least four fluorine atoms and at least one atom of an element selected from the group consisting of titanium, zirconium, hafnium, silicon, and boron, and, optionally, ionizable hydrogen atoms, and optionally, one or more oxygen atoms; a component of cations of elements selected from the group consisting of cobalt, magnesium, manganese, zinc, nickel, tin, zirconium, iron, and copper; the ratio of the total number of cations of this component to the total number of anions of component being at least 1:5; sufficient free acid to give the composition a pH in the range from 0.5 to 5.0; a component selected from the group consisting of phosphorus-containing inorganic oxyanions and phosphonate anions; and a component selected from the group consisting of water-soluble and water-dispersible organic polymers and polymer-forming resins and, preferably, also including a component selected from the group consisting of tungstate, molybdate, silicotungstate, and silicomolybdate anions.

通过对包含以下成分的含水酸性液体进行干燥，可以在金属上形成无铬的转换涂层，该涂层与普通铬酸盐转换涂层相比，至少在抗腐蚀质量上等效：$_一种阴离子成分，所述各个阴离子包括至少4个氟原子，至少选自钛、锆、铪、硅与硼元素中的1个原子。任选地可离解的氢原子，任选地1个或多个氧原子；$_一种选自钴、镁、锰、锌、镍、锡、锆、铁与铜元素的阳离子成分，上述成分的阳离子总数与成分内的阴离子总数之比至少为1∶5；$_足够的游离酸以使该组合物的pH值在0.5～5.0的范围内；$_一种选自含磷的无机含氧阴离子与膦酸盐阴离子的成分；$一种选自水溶性与水可分散性有机聚合物与聚合物形成的树脂的成分，优选还包括一种选自钨酸盐、钼酸盐、钨硅酸盐与钼硅酸盐阴离子的成分。

Woodson or apocynum venetum Linn as raw material, it utilizes the method of decoction and alcohol sedimentation to remove impurity. After extract is separated by macroporous adsorptive resins, then use polydextran gel LH-20 to purify, obtain isoquercitrin. Compared with the method of traditional silica gel column chromatography, this method has characteristics such as: experiment period is short, dissipation of organic dissolvent is little, yield of produced product is high, and purity coefficient is fine and so on. Isoquercitrin produced by this invention can be provided for medicine research or used as chemistry control article.

Woodson或罗布麻的叶为原料，采用水提醇沉除杂的方法，提取液经大孔吸附树脂分离后再用葡聚糖凝胶LH-20纯化得罗布麻甲素，此法与传统硅胶柱层析的方法相比，具有实验周期短，有机溶媒消耗少，制得的产品得率高和纯度好的特点，本法制得的罗布麻甲素可供药物研究或化学对照品使用。

A liquid, C10H16, with a characteristic lemonlike fragrance, used as a solvent, wetting agent, and dispersing agent and in the manufacture of resins.

苯烯一种液体，c10h16，有柠檬香味，用作溶剂、润湿剂和分散剂，并产于树脂中

The work proved the possibility of substituting inorganic acid with strong acidic resins for levulinic acid preparation from biomass.

该研究结果证实了用耐水型强酸性树脂替代现有的无机酸催化制备乙酰丙酸的可能性。

Objective To explore the optimal techniques in separation of phenols from Melastoma dodecandrum with macroporous resins.

目的 筛选大孔树脂分离纯化地菍中总酚类物质的最佳工艺。

Employing HP-8-8 polyacrylic resins as a porous multimolecular carrier for fixed cultivation of sludge,experimental investigation of wastewater treating was carried out by means of fluidization with biofilm sequencing batch reactor.

采用HP88型聚丙烯酸酯类多孔高分子载体对污泥实行固定化培养，以流态化方式进行生物膜SBR 废水处理试验研究。

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。