Laser light scattering studies of soluble high-performance polyimides: Solution properties and molar mass distributions
文献类型：期刊论文
| 作者 | Siddiq M ; Hu HH ; Ding MX ; Li BZ ; Wu C |
| 刊名 | macromolecules
 |
| 出版日期 | 1996 |
| 卷号 | 29期号:23页码:7426-7431 |
| ISSN号 | 0024-9297 |
| 中文摘要 | two soluble high-performance polyimides, poly(bcpobda/dmmda) and poly(odpa/dmmda), in chcl3 at 25 degrees c have been studied using laser light scattering. we found that the z-average radius of gyration ([r(g)]) can be scaled to the weight-average molecular weight (m(w)) as [r(g)] (nm) = 4.95 x 10(-2)m(w)(0.52) and [r(g)] (nm) = 1.25 x 10(-2)m(w)(0.66) respectively for poly(bcpobda/dmmda) and poly(odpa/dmmda), indicating that poly(odpa/dmmda) in chcl3 at 25 degrees c has a more extended chain conformation than poly(bcpobda/dmmda). using the wormlike chain model approach, we found that the flory characteristic ratios (c*) of poly(bcpobda/dmmda) and poly(odpa/dmmda) are similar to 20 and similar to 31, respectively, indicating that both of them have a slightly extended chain conformation in comparison with typical flexible polymer chains, such as polystyrene, whose c-infinity is similar to 10. a combination of the weight-average molar mass (m(w)) with the translational diffusion coefficient distributions (g(d)) has led to d (cm(2)/s) = 3.53 x 10(-4)m(-0.579) and d (cm(2)/s) = 4.30 x 10(-4)m(-0.613) respectively for two soluble high-performance polyimides, poly(bcpobda/dmmda) and poly(odpa/dmmta), in chcl3 at 25 degrees c. using these two calibrations, we have successfully characterized the molar mass distributions of the two polyimides from their corresponding g(d)s. the exponents of these two calibrations further confirm that both of the polyimides have a slightly extended coil chain conformation in chcl3. the chain flexibility difference between these two polyimides has also been discussed. |
| 收录类别 | SCI收录期刊论文 |
| 语种 | 英语 |
| 公开日期 | 2010-12-22 ; 2011-06-09 |
| 源URL | [http://ir.ciac.jl.cn/handle/322003/25177]  |
| 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 | Siddiq M,Hu HH,Ding MX,et al. Laser light scattering studies of soluble high-performance polyimides: Solution properties and molar mass distributions[J]. macromolecules,1996,29(23):7426-7431. |
| APA | Siddiq M,Hu HH,Ding MX,Li BZ,&Wu C.(1996).Laser light scattering studies of soluble high-performance polyimides: Solution properties and molar mass distributions.macromolecules,29(23),7426-7431. |
| MLA | Siddiq M,et al."Laser light scattering studies of soluble high-performance polyimides: Solution properties and molar mass distributions".macromolecules 29.23(1996):7426-7431. |
入库方式： OAI收割
来源：长春应用化学研究所
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