查询词典 polyimide

Disclosed is a polyimide resin having a glass transition temperature of 200-320 DEG C and containing a siloxane diamine residue, a fluorene diamine residue and a specific tetracarboxylic acid dianhydride residue at certain ratios.

本发明提供玻璃化转变温度为200～320℃，以特定比例含有硅氧烷系二胺残基、芴系二胺残基和特定四羧酸二酐残基的聚酰亚胺树脂。

PI-1 and PI-2 polyimide films were prepared from 3,3′,4,4′-benzophenone tetracarboxylic dianhydride and ODA确良by two-step polymerization under the thermal and mixed imidization procedures.

采用两步法首先合成聚酰胺酸，然后经热酰亚胺化和混合酰亚胺化工艺制备了BTDA/ODA型的PI-1 和PI-2两种聚酰亚胺薄膜。

Basing on these conclusions, Polyimide/silica composite material films with different silica contents have been prepared by sol-gel approach, and the characters were tokened; Ethanol/water mixture were separated using PI film based on pervaporation, the changing relations of permeation flux, separation factor and concentration, temperature were studied.

在上述试验基础上，采用溶胶-凝胶法制备不同SiO_2含量的PI/SiO_2复合薄膜，对其性能进行了表征；利用制备的PI薄膜渗透汽化分离乙醇/水溶液，研究了渗透通量和分离因子随料液浓度和温度的变化关系。

The successful synthesis of the aromatic triamine containing pyridine ring laid an important foundation for preparation of a novel hyperbranched polyimide.

这种新型含吡啶环芳香三胺单体的成功合成将为一类新型超支化聚酰亚胺的制备奠定重要的基础。

Taking 2,4,6-triaminopyrinide as triamine monomer, polyimide foams with cross-linked structures were prepared by foaming poly precursor powders.

以2，4，6-三氨基嘧啶为三胺单体，经由聚酯铵盐前体粉末发泡合成了具有交联结构的聚酰亚胺泡沫。

The result shows that the polyimide containing triphenylamine has distinct fluorescence.

结果表明，含三苯胺基团聚酰亚胺呈现明显的荧光特性。

The etching solution is composed of Potassium hydroxide, Sodium hydroxide, and additives. The window of demanding is crosshatched in certain conditions on polyimide flexible substrate.

采用化学蚀刻法，蚀刻液由氢氧化钾、氢氧化钠和添加剂组成，于一定的工艺条件下在挠性印制电路板聚酰亚胺基材上开出所需大小、形状的窗口。

A new crosshatching technology on polyimide flexible substrate is described using chemical etching method.

介绍了一种在挠性聚酰亚胺基材上开窗口的新工艺。

The demerits of the pre-investment and maintenance costs too high or precision too low to traditional crosshatching process are conquered. The new crosshatching technology on polyimide flexible substrate can be applied in the small and high-density FPCB products that have high added value.

该方法克服了传统的开窗口工艺具有的先期投入和维护成本高、精度不够的缺点，可以完成高附加值的小型、高密度的挠性电路板的生产。

As one of the most promising functional polyimide materials, fluorinated polyimides gained much attention in recent years.

含氟聚酰亚胺的研究是目前聚酰亚胺功能化研究中最为引人注目的热点之一。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。