查询词典 polyamides

Polyamides provide slightly better pH resistance than cellulose acetate but are slightly more sensitive to chlorine.

聚酰胺比纤维素醋酸酯有略好的pH值抗性，但却对氯更为敏感。

The fluorinated polyamides could be dissolved in strong aprotic solvents and some low boiling point solvents, such as cyclopentanone, to form homogenously solution with solid content higher than 20%.

这一系列聚酰胺材料在极性溶剂或低沸点溶剂如环戊酮中都具有较好的溶解性，可以获得固含量高达20％以上的均相溶液，并在较的低温下固化成膜。

Co condensation type polyamides were prepared by using 1,2 dihydro 2 (4 aminophenyl) 4 [4 (4 aminophenoxyl) phenyl] phthalazin 1 one and 4,4′ diamino biphenyl ether or 4,4′ diamino biphenyl methane as the co diamine monomers and aromatic diacid as the co condensation monomer.

采用 1 ，2 -二氢-2 -( 4-氨基苯基)-4 -[4 -( 4-氨基苯氧基)-苯基 ]-二氮杂萘-1 -酮、4 ，4′-二氨基二苯醚、4 ，4′-二氨基二苯甲烷为共缩聚二胺单体与对苯二甲酸进行共缩聚反应，制备共缩聚型聚酰胺。

Seven polyamides containing 5-fluorouracil in the side chain were synthesized by the condensation of di-p-nitrophonyl N-(5-fluorouracil-1-acetyl)- glutamate with a series of polymethylene diamines and lysine ethyl ester.

用1，3-双-5-氟尿嘧啶和双（2-氯乙基）氨基磷酰二氯，在DMF中反应合成了10个含三个组份的聚合物。

The inherent viscosities of the resulting polyamides were in the range of 0.46~0.82 dL/g.

这些聚醯胺的固有黏度范围在0.46~0.82 dL/g。

The solubility of the novel polyamides are greatly improved compared with the conventional aramids, especially the polyamide with dendritic blocks of the second genernation as side chains are soluble in most of the common organic solvents such as ether, ethyl acetate, chloroform, acetone, tetrahydrafuran etc.

树状片段的引入大大地改善了聚酰胺的溶解性，特别是以第二代树状片段为侧基的聚酰胺的溶解性得到了很大的改进，可以溶于大部分常见的有机溶剂，如乙醚、乙酸乙酯、氯仿、丙酮、四氢呋喃等。

Tire cord fabric made of nylon or other polyamides high tenacity yarns.

尼龙或其他聚酰胺高强力纱制的帘子布。

Air Products offers a full line of performance-oriented epoxy hardeners, polyamides and modifiers for a variety of applications, including coatings, civil engineering, adhesives and composites.

空气化工产品有限公司提供一整套高性能的环氧树脂固化剂、聚酰胺和改性胺固化剂，可应用在涂料、土木建筑工程、胶粘剂和复合材料等多个领域。

It is converted to a series of polyamides and polyesters by means of low-temperature solution polycondensation and interfacial polycondensation.

以间二甲苯和多聚甲醛为原料合成了芳香性螺双内酯单体――5，5′-二甲酰氯-7，7′-二氧-2，2′-螺双，并通过常温溶液缩聚和界面缩聚合成了一系列聚酰胺和聚酯。

Studied the effect of the component, solvent and temperature on the fluorescence properties of these polyamides, the results showed that the fluorescence properties of these polyamides changed with the ratio of the substrate and other factors.

结果发现由于投料比及活化剂用量的不同，产物呈现出不同的荧光性能，这可能与不同条件下聚合物具有不同的文化结构有关。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。