查询词典 elastomers

Sliding mechanic with active tieback is widely applied in preadjusted appliance in space closure. Several types of elastomers such as elastomeric ligatures, single unit elastic chain, and two units of elastic chain are used in active tieback.

随著越来越多的拔牙病例采用越来弹力橡皮圈来关闭拔牙间隙，临床上主动结扎使用的弹力橡皮圈包括结扎圈、单个的弹力链、两个单位的弹力链等。

Bromination occur s selectively on the PMS methyl group, providing a reactive benzylic bromine functionality which is the key to Exxpro specialty elastomers′ vulcanization and modification versatility.

溴化反应选择性地发生在PMS的甲基基团上，提供活性苄基溴官能团，这也是Exxpro特种弹性体硫化和各种改性的关键。

Bromination occurs selectively on the PMS methyl group, providing a reactive benzylic bromine functionality which is the key to Exxpro specialty elastomers′ vulcanization and modification versatility.

溴化反应选择性地发生在PMS的甲基基团上，提供活性苄基溴官能团，这也是Exxpro特种弹性体硫化和各种改性的关键。

It was shown that at proper hard segment content, the elastomer had unique properties similar to other segmented polyurethane elastomers, but the soft segment was not crystallizable and was cheper.

这种材料兼具有橡胶的高弹性和塑料的高强度，应用领域非常广泛。优异的物理性能和可以塑化成型这两个特点使高分子学者注目。

Polyether based polyurethanes are among the most interested polymers which have been used suitably for the biomedical applications, especially in cardiovascular system. In order to meet the requirements of the artificial heart program in our college, two sorts of polyether based polyurethane elastomers, PU-BD and PU-MC, were synthesized both based on prepolymer formed by the reaction of polytetramethylene ether glycol and diphenyl methane-4, 4′-diisccyanate, with 1, 4-butanediol and 3, 3′-dich...

本文介绍了两种聚醚型聚氨酯弹性体PU—BD和PU—MC的合成路线，两种弹性体的物理机械性能(曲挠、抗张强度、伸长率等)的测试结果，两种弹性材料的生物相容性试验(凝血时间，慢性组织相容性、细胞毒性等)及其结果、各种试验结果表明，这两种聚氨酯弹性材料的耐曲挠性能和生物相容性都已达到现阶段人工心脏研究工作的要求，为两种有希望的医用高分子材料。

A series of casting polyurethane elastomers were synthesized by using polyester polyols,4,4'-diphenylmethane diisocyanate,and chain extender mixture of 1,4-butanediol with trimethylolpropane.

用聚酯多元醇(PBA、PEA、PEPA、PCL)、4，4'-二苯基甲烷二异氰酸酯和混合扩链剂等原料合成了浇注型聚氨酯弹性体。

PPE offers the most technically advanced range of sealing materials, including EnDura and Perlast elastomers plus high performance plastics, which provide the ultimate in high and low temperature performance, chemical and ED resistance for critical sealing applications.

PPE 提供了技术上最为先进的系列密封材料，其中包括 EnDura 和 Perlast 弹性体和高性能塑料，它们能在苛刻的密封使用环境中实现耐高低温、耐化学和抗 ED方面的终极性能。

The effects of isocyanurate group on the mechanical property and solvent resistance property of PU elastomers are investigated by changing NCO content.

通过改变NCO含量考察异氰脲酸酯基团对聚氨酯弹性体的力学性能及耐溶剂性能的影响。

Isocyanurate was qualitatively identified by infra-red absorption spectroscopy analysis, the quantity of isocyanurate was calculated according to mass fraction of NCO measured by di-n-butylamine method, the thermal stability of prepared elastomers was characterized by thermogravimetric analysis.

用红外光谱法证实了产物中异氰脲酸酯的存在，根据用二正丁胺法测得的NCO基团的质量分数可计算出异氰脲酸酯的质量分数，用热重法分析了产物的热稳定性。

This paper makes detailed discussion on production process of millable polyurethane elastomers, points out that plasticity has close contact with production process of MPU and product quality.

详细论述了混炼型聚氨酯弹性体的加工过程和特性，通过实验指出了生胶可塑度与MPU的加工过程和质量有密切的关系，影响可塑度的因素有生胶中硬链段的含量、聚酯二醇的结构和生胶的分子

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。