Synthesis and properties of soluble polyimides based on isomeric ditrifluoromethyl substituted 1,4-bis(4-aminophenoxy)benzene
文献类型：期刊论文
| 作者 | Qiu, Zhiming; Wang, Junhua; Zhang, Quanyuan; Zhang, Suobo; Ding, Mengxian; Gao, Lianxun |
| 刊名 | POLYMER
 |
| 出版日期 | 2006-12-08 |
| 卷号 | 47期号:26页码:8444-8452 |
| 关键词 | Polyimides Fluorinated Polyimides Gas Permeability |
| ISSN号 | 0032-3861 |
| DOI | 10.1016/j.polymer.2006.10.031 |
| 英文摘要 | A new fluorinated diamine monomer, [1,4-bis(4-amino-3-trifluoromethylphenoxy)benzene (2)], and a known isomeric analog 1,4-bis(4-amino-2-trifluoromethylphenoxy)benzene (3) were synthesized. A series of organosoluble polyimides Ia-d and IIa were prepared from the diamines (2, 3) and dianhydrides (a-d) by a high-temperature one-step method. The effects of the trifluoromethyl substituents on the properties of polyimides were evaluated through the study of their soluble, thermal, optical, and gas permeability properties. Polyimides (Ia-d) had glass transition temperatures between 229 and 279 degrees C, and the temperatures at 5% weight loss ranged from 510 to 533 degrees C under nitrogen. These polyimides could be cast into flexible and tough membranes from DMAc solutions. The membranes had tensile strengths in the range of 137-169 MPa, tensile modulus in the range of 1.6-2.2 GPa and elongations at break from 11% to 14%. The polyimide la with trifluoromethyl groups ortho to the imide nitrogen exhibited enhanced gas permeability, solubility, transparency, and thermal stability compared with the isomeric polyimide IIa with the CF3 group meta to the imide nitrogen. Thus, the effect of substituents in the ortho-positions of nitrogen on properties was greater than the effect of substituents in the meta-positions. (c) 2006 Elsevier Ltd. All rights reserved. |
| 语种 | 英语 |
| WOS记录号 | WOS:000243044400007 |
| 出版者 | ELSEVIER SCI LTD |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/58419]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Zhang, Suobo |
| 作者单位 | 1.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Qiu, Zhiming,Wang, Junhua,Zhang, Quanyuan,et al. Synthesis and properties of soluble polyimides based on isomeric ditrifluoromethyl substituted 1,4-bis(4-aminophenoxy)benzene[J]. POLYMER,2006,47(26):8444-8452. |
| APA | Qiu, Zhiming,Wang, Junhua,Zhang, Quanyuan,Zhang, Suobo,Ding, Mengxian,&Gao, Lianxun.(2006).Synthesis and properties of soluble polyimides based on isomeric ditrifluoromethyl substituted 1,4-bis(4-aminophenoxy)benzene.POLYMER,47(26),8444-8452. |
| MLA | Qiu, Zhiming,et al."Synthesis and properties of soluble polyimides based on isomeric ditrifluoromethyl substituted 1,4-bis(4-aminophenoxy)benzene".POLYMER 47.26(2006):8444-8452. |
入库方式： OAI收割
来源：化学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。