Syntheses and properties of polyimides derived from diamines containing 2,5-disubstituted pyridine group
文献类型：期刊论文
| 作者 | Xia AX ; Guo HQ ; Qiu XP ; Ding MX ; Gao LX |
| 刊名 | journal of applied polymer science
 |
| 出版日期 | 2006 |
| 卷号 | 102期号:2页码:1844-1851 |
| 关键词 | VINAMIDINIUM HEXAFLUOROPHOSPHATE SALTS EFFICIENT PREPARATION HEAT-RESISTANT COPOLYMERS ANNULATION MONOMER KETONES UNITS |
| ISSN号 | 0021-8995 |
| 通讯作者 | gao lx |
| 中文摘要 | a series of novel homo- and copolyimides containing pyridine units were prepared from the heteroaromatic diamines, 2,5-bis (4-aminophenyl) pyridine and 2-(4aminophenyl)-5-aminopyridine, with pyromelltic dianhydride (pmda), and 3,3',4,4'-biphenyl tertracarboxylic dianhydride (bpda) via a conventional two-step thermal imidizaton method. the poly(amic acid) precursors have inherent viscosities of 1.60-9.64 dl/g (c = 0.5 g/dl in dmac, 30 degrees c) and all of them can be cast and thermally converted into flexible and tough polyimide films. all of the polyimides show excellent thermal stability and mechanical properties. the polyimides have 10% weight loss temperature in the range of 548-598 degrees c in air. the glass transition temperatures of the pmda-based samples are in the range of 395-438 degrees c, while the bpda-based polyimides show two glass transition temperatures (t(g)1 and t(g)2), ranging from 268 to 353 degrees c and from 395 to 418 degrees c, respectively. the flexible films possess tensile modulus in the range of 3.42-6.39 gpa, strength in the range of 112-363 mpa and an elongation at break in the range of 1.2-69%. the strong reflection peaks in the wide-angle x-ray diffraction patterns indicate that the polyimides have a high packing density and crystallinity. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000240207100120 |
| 公开日期 | 2010-08-17 |
| 源URL | [http://ir.ciac.jl.cn/handle/322003/16709]  |
| 专题 | 长春应用化学研究所_长春应用化学研究所知识产出_期刊论文 |
| 推荐引用方式 GB/T 7714 | Xia AX,Guo HQ,Qiu XP,et al. Syntheses and properties of polyimides derived from diamines containing 2,5-disubstituted pyridine group[J]. journal of applied polymer science,2006,102(2):1844-1851. |
| APA | Xia AX,Guo HQ,Qiu XP,Ding MX,&Gao LX.(2006).Syntheses and properties of polyimides derived from diamines containing 2,5-disubstituted pyridine group.journal of applied polymer science,102(2),1844-1851. |
| MLA | Xia AX,et al."Syntheses and properties of polyimides derived from diamines containing 2,5-disubstituted pyridine group".journal of applied polymer science 102.2(2006):1844-1851. |
入库方式： OAI收割
来源：长春应用化学研究所
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。