Local chain motions in a dilute solution of phenolphthalein poly(ether sulfone)
文献类型：期刊论文
| 作者 | Wang JL ; Zhang JG ; Li BY ; Feng ZL |
| 刊名 | macromolecular chemistry and physics
 |
| 出版日期 | 1996 |
| 卷号 | 197期号:4页码:1459-1471 |
| 关键词 | NUCLEAR MAGNETIC-RELAXATION SPIN RELAXATION DISSOLVED POLYCARBONATES ORIENTATION RELAXATION MACROMOLECULAR CHAINS CORRELATION TIMES DYNAMICS DISTRIBUTIONS POLYMERS LATTICE |
| ISSN号 | 1022-1352 |
| 中文摘要 | c-13 and h-1 relaxation times were measured as a function of temperature in two magnetic fields for dilute solutions of phenolphthalein poly(ether sulfone) (pes-c) in deuterated chloroform. the spin-lattice relaxation times were interpreted in terms of segmental motion characterized by the sharp cutoff model of jones and stockmayer (j. s. model). the phenyl group rotation is treated as a stochastic diffusion by the j. s. model. the restricted butterfly motion of the phenyl group attached to the cardo ring in pes-c is mentioned but is not discussed in detail in this work. correlation times for the segmental motion are in the picosecond range which indicates the high flexibility of pes-c chains. the correlation time for the phenyl group internal rotation is similar to that of the segmental motion. the temperature dependence of these motions is weak. the apparent activation energy of the motions considered is less than 10 kj/mol. the simulating results for pes are also reasonable considering the differences in structure compared with pes-c. the correlation times and the apparent activation energy obtained using the j. s. model for the main chain motion of pes-c are the same as those obtained using the damped orientational diffusion model and the conformational jump model. |
| 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/322003/25495]  |
| 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 | Wang JL,Zhang JG,Li BY,et al. Local chain motions in a dilute solution of phenolphthalein poly(ether sulfone)[J]. macromolecular chemistry and physics,1996,197(4):1459-1471. |
| APA | Wang JL,Zhang JG,Li BY,&Feng ZL.(1996).Local chain motions in a dilute solution of phenolphthalein poly(ether sulfone).macromolecular chemistry and physics,197(4),1459-1471. |
| MLA | Wang JL,et al."Local chain motions in a dilute solution of phenolphthalein poly(ether sulfone)".macromolecular chemistry and physics 197.4(1996):1459-1471. |
入库方式： OAI收割
来源：长春应用化学研究所
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