聚酰亚胺

The biphenyl Polyimide was also synthesized by two-step method.

聚酰亚胺是目前已经工业化的工程塑料中耐热性能最好的品种之一。

Synthesis and Property Study of 4, 4'-Bis(4-aminophenoxy)-3, 3', 5, 5'-tetramethyl Biphenyl and Polyimide Therefrom

篇名 4， 4'-双（4-氨基苯氧基）－3， 3'， 5， 5'-四甲基联苯及其聚酰亚胺的合成与性能研究

Biphenyl polyimides derived from asymmetric bis s have good solubilities and film formation.

6由不对称双氯单体合成的联苯型聚酰亚胺具有良好的溶解性和成膜性。

Cobalt caprate Products identified as "high-tech products in Henan Province" and won the "outstanding new products in Jiaozuo City, the first prize" and "in Jiaozuo City of scientific and technological progress second prize."

癸酸钴产品被认定为"河南省高新技术产品"，并荣获"焦作市优秀新产品一等奖"和"焦作市科技进步二等奖"。2005年高性能聚酰亚胺树脂的研制与开发项目通过河南省科技成果鉴定，达到国内领先水平。

Products has led caprate cobalt, cobalt naphthenate, TY series of high-performance polyimide resin, FLQ type latent epoxy curing promoting agent, diallyl bisphenol A Product dozens of top-five.

主导产品有癸酸钴、环烷酸钴、TY系列高性能聚酰亚胺树脂、FLQ型潜伏性环氧固化促进剂、二烯丙基双酚A五大类数十种产品。

The changes of structure and property of polyimide film were studied at high carbonization temperature in N2 atmosphere.

研究了在氮气流保护下，聚酰亚胺薄膜在高温炭化过程中结构和性能的变化规律。

Test results show that the permittivity of the films is significantly lower than that of pure PI film and nano carborundum powder, meanwhile, the films have lower water absorption.

结果表明，该复合薄膜的介电常数比纯聚酰亚胺和碳化硅均显著降低，吸水率下降。

In this thesis,a series of fluorenyl Cardo polyimides were synthesized and the structure-property relationship was investigated.

本论文合成了一系列芴基Cardo型聚酰亚胺，研究其结构与性能的关系。

Tg of polyimides based on ODPA decrease slightly with the number and size of alkyl substituents on fluorenyl cardo diamine,but Tg of all ODPA-typed polyimides exceed 310℃.

尽管基于ODPA的聚酰亚胺的Tg随芴基Cardo二胺上烷基取代基数量及尺寸的增加而有所下降，但是其Tg仍然超过310℃。

The results show that the incorporation of noncoplanar structure led by the introducing alkyl substituents on fluorenyl cardo diamines improves the solubility of cardo polyimides in organic solvents without sacrificing thermal properties.

结果表明，通过在芴基Cardo二胺引入烷基取代基而形成非共平面结构能改善聚酰亚胺的溶解性，而不牺牲热性能。2。

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。