Chain Conformation and Local Rigidity of Isomerized Polyimides in Dimethyl Formamide by Size Exclusion Chromatography Coupled with Multi-Detectors
文献类型：期刊论文
| 作者 | Liu GH ; Qiu XP ; Bo SQ ; Ji XL |
| 刊名 | chromatographia
 |
| 出版日期 | 2012 |
| 卷号 | 75期号:1-2页码:7-15 |
| 关键词 | LASER-LIGHT-SCATTERING MOLECULAR-WEIGHT SEPARATION INTRINSIC-VISCOSITY DILUTE-SOLUTION SIMULTANEOUS CALIBRATION COLUMN DISPERSION POLYMERS PARAMETERS RADIUS |
| ISSN号 | 0009-5893 |
| 通讯作者 | ji xl |
| 中文摘要 | chain conformation and local rigidity of two isomerized polyimides (pis), poly(6fda/3,3'-dmb) and poly(6fda/2,2'-dmb) in dimethyl formamide (dmf) with either 0.1 m libr or 3.1 mm tetrabutylammonium bromide at 35 a degrees c, are investigated. size exclusion chromatography (sec) coupled with multi-angle laser light scattering detector, viscometer, and differential refractive index detector was used. the scaling exponents alpha and nu related to conformation are estimated from the above results. the values of alpha and nu for poly(6fda/3,3'-dmb) are 0.68 +/- a 0.01 and 0.54-0.55 +/- a 0.01, respectively. the values of alpha and nu for poly(6fda/2,2'-dmb) are 0.65 +/- a 0.02 and 0.55 +/- a 0.01, respectively, which indicate that both pis in dmf have a random coil conformation. in particular, poly(6fda/3,3'-dmb) exhibits more extended conformation than that of poly(6fda/2,2'-dmb). parameters related to chain flexibility of polymers, including persistence length l (p), shift factor m (l) (relative molecular weight per unit contour length), and backbone diameter d are evaluated from the relationship between intrinsic viscosity and molecular weight based on the wormlike continuous cylinder model. the three parameters (l (p), m (l), and d) indicate that the two samples are flexible chains with local rigidity, and poly(6fda/3,3'-dmb) is slightly stiffer than poly(6fda/2,2'-dmb). in addition, influence of salt types on the parameters is also discussed. |
| 收录类别 | SCI收录期刊论文 |
| 语种 | 英语 |
| WOS记录号 | WOS:000298654000002 |
| 公开日期 | 2013-09-03 |
| 源URL | [http://ir.ciac.jl.cn/handle/322003/48738]  |
| 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 | Liu GH,Qiu XP,Bo SQ,et al. Chain Conformation and Local Rigidity of Isomerized Polyimides in Dimethyl Formamide by Size Exclusion Chromatography Coupled with Multi-Detectors[J]. chromatographia,2012,75(1-2):7-15. |
| APA | Liu GH,Qiu XP,Bo SQ,&Ji XL.(2012).Chain Conformation and Local Rigidity of Isomerized Polyimides in Dimethyl Formamide by Size Exclusion Chromatography Coupled with Multi-Detectors.chromatographia,75(1-2),7-15. |
| MLA | Liu GH,et al."Chain Conformation and Local Rigidity of Isomerized Polyimides in Dimethyl Formamide by Size Exclusion Chromatography Coupled with Multi-Detectors".chromatographia 75.1-2(2012):7-15. |
入库方式： OAI收割
来源：长春应用化学研究所
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