查询词典 poly

A series of thermoplastic polyurethane elastomers with different fraction of hard segments based on poly (ethylene-propylene adipate)/ethylene oxide/tetrahydrofurancopolyether as soft segments were synthesized.

合成了以PET/PEPA为软段的不同硬段含量的热塑性聚氨酯弹性体，利用凝胶渗透色谱、傅立叶变换红外对其进行了表征，并测试了其力学性能。

Packing material made of air bubble s that are encased between two poly sheets as they are sealed together.

包装材料，由两块聚酯薄膜密封在一起而在它们之间装入的气泡制成。

During the Polyvinyl Alcohol producion, the product cannot be polymerized by the monomer directly. Generally, it can be obtained by alcoholysis of poly vinyl acetate in the solution of methanol.

在聚乙烯醇生产过程中，因产品不能由其单体直接聚合得到，通常采用聚醋酸乙烯在甲醇中醇解得到，该过程副产大量的醋酸甲酯。

The structure of cell wall was not destroyed by the algaecide. So we could know: after being contacted with the algae, the algaecide could penetrate the cell wall and reacted with the protein directly, damaging the function of cell and killing the cell at last.Furthermore, we blended the isothiazolone with the high polymer, such as chitin, chitosan and poly, and prepared the slow-release drug films.

实验发现，异噻唑啉酮对棕囊藻的细胞形态结构破坏程度不大，表明了异噻唑啉酮对藻体的细胞壁、细胞膜具有很强的穿透作用，能够快速穿透细胞壁和细胞膜，与细胞内部的蛋白质作用，抑制细胞生理功能的正常发挥，导致藻体死亡。

At the same time, this product line can fit for PP-C, PE-X couplet pipe and poly alkene product.

同时，该生产线可适应PP-C、PE-X交联管及聚烯烃等制品生产。

Combining the performance evaluation (activity, selectivity and stability) and the characterization of the catalysts (XRD, TPD, FTIR and the pore structure measure), it can be concluded that :(1)The activity of modified β is higher than MCM-22, but the selectivity of ethylbenzene is lower about 3% than that of MCM-22;(2)The mounts of diethylbenzene and the other by-products are higher 1.7 times and 1.5 times than these of MCM-22 respectively;(3)The catalytic performance of zeolite mixture is nearly equal to modified β, but the selectivity of ethylbenzene is higher about 0.5% than that of modified β;(4)The catalytic activity of zeolite is mainly correlated with the number of acid sites, strength and distribution, and the distribution of products is determined by the binding energy of ethylbenzene and the pore structure, while the stability of catalyst is affected by the amount of poly-ring aromatic alkylate and the pore structure.

以性能评价和特性表征（XRD、TPD、FTIR和孔结构测定）相结合的方式，对上述三种催化剂性能比较的结果表明：（1）改性的活性明显高于MCM-22，但乙苯选择性却低于MCM-22绝对差约3%；（2）改性(上二乙苯和其他副产物的生成量分别约为MCM-22上对应值的1.7和1.5倍左右；（3）混合型催化剂的性能与改性相仿，但乙苯选择性提高0.5%左右；（4）对乙苯合成，沸石催化剂的活性主要取决于其B酸中心数、酸强度及酸分布，产物分布则取决于催化剂表面的乙苯脱附能垒值和孔道结构，而稠环芳烃的生成量和催化剂孔道结构是影响催化剂稳定性的主要因素。

The new methods allow a wide range of poly analogs to be obtained in few steps, as the allylic precursors are readily available.

新方法允许范围广泛的聚类似物，以获得在几个步骤，作为烯前体是现成的。

As one of principal raw materials, hydrochloric acid is consumed for production of poly aluminum chloride.

介绍聚合氯化铝的用途，性能，产品指标；用盐酸与铝酸钙粉生产聚合氯化铝的工艺技术，消耗及投资情况。

Based on the research of commercial PAC made by different technologies,it is found that poly—aluminum chloride containing more high molecular weight plays a more important role in coagulation.

通过对不同生产工艺得到的商品聚合氯化铝进行聚合物种类的研究，并结合混凝实验，发现高分子聚合氯化铝对混凝效果发挥了更大的作用。

Using the latest technology, the application of high-quality raw materials, production of poly aluminum chloride to water purification agent quality, stable performance.

采用最新工艺，应用优质原材料生产的聚氯化铝净水剂以质量上乘，性能稳定。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。