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, Guihua1,2; Qiu, Xuepeng3; Bo, Shuqin1; Ji, Xiangling1 |
| 刊名 | CHROMATOGRAPHIA
 |
| 出版日期 | 2012 |
| 卷号 | 75期号:1-2页码:7-15 |
| 关键词 | Size Exclusion Chromatography Chain Conformation Isomerized Polyimide Local Rigidity Persistence Length Wormlike Chain |
| ISSN号 | 0009-5893 |
| DOI | 10.1007/s10337-011-2159-3 |
| 英文摘要 | 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. |
| 语种 | 英语 |
| WOS记录号 | WOS:000298654000002 |
| 出版者 | SPRINGER HEIDELBERG |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/47765]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Ji, Xiangling |
| 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 3.Chinese Acad Sci, Changchun Inst Appl Chem, Polymer Composites Engn Lab, Changchun 130022, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Guihua,Qiu, Xuepeng,Bo, Shuqin,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, Guihua,Qiu, Xuepeng,Bo, Shuqin,&Ji, Xiangling.(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, Guihua,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：化学研究所
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