Nuclear magnetic resonance relaxation studies of polyacrylamide solution
文献类型：期刊论文
| 作者 | Mao, SZ; Zhang, XD; Dereppe, JM; Du, YR |
| 刊名 | COLLOID AND POLYMER SCIENCE
 |
| 出版日期 | 2000-03-01 |
| 卷号 | 278期号:3页码:264-269 |
| 关键词 | polyacrylamide nuclear magnetic resonance relaxation cohesional entanglement |
| 英文摘要 | The cohesive interaction among polymer chains in a polyacrylamide (PAAm)-D2O solution has been studied by NMR relaxation. The NMR relaxation times of PAAm in the good solvent D2O were measured at different temperatures. The results show that the solution system has a high local viscosity and that its relaxation characteristic is soft-solid-like. The temperature dependence of the relaxation behavior of the solution is obviously different from that of ordinary polymer solutions. The difference lies in the relaxation behavior of the methylene protons in the main chain of PAAm, as shown by analyzing the relaxation process with single exponential and biexponential decays. As the temperature increases, the solvation is weakened, leading polymer chains to form curling coils, thus hindering the movement of the methylene protons among the main chains. It can be expected from the existence of 80% fast-relaxing protons that there are a thigh number of entanglements among the polymer chains in PAAm solution. The information about entanglements among the polymer chains can be deduced from the biexponential dependence of the spin-spin relaxation on the concentration of the polymer solutions. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Chemistry, Physical ; Polymer Science |
| 研究领域[WOS] | Chemistry ; Polymer Science |
| 关键词[WOS] | CONCENTRATED CYCLOHEXANE SOLUTION ; CHAIN SEGMENTAL MOTION ; LOCAL DYNAMICS ; POLYMER-CHAIN ; POLYSTYRENE ; NMR ; ENTANGLEMENT |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000085949500012 |
| 公开日期 | 2015-12-01 |
| 源URL | [http://ir.wipm.ac.cn/handle/112942/8474]  |
| 专题 | 武汉物理与数学研究所_2011年以前论文发表（包括2011年） |
| 作者单位 | 1.Chinese Acad Sci, Wuhan Inst Phys & Math, Lab Magnet Resonance & Atom & Mol Phys, Wuhan 430071, Peoples R China 2.Univ Louvain, Unite CPMC, Louvain, Belgium |
| 推荐引用方式 GB/T 7714 | Mao, SZ,Zhang, XD,Dereppe, JM,et al. Nuclear magnetic resonance relaxation studies of polyacrylamide solution[J]. COLLOID AND POLYMER SCIENCE,2000,278(3):264-269. |
| APA | Mao, SZ,Zhang, XD,Dereppe, JM,&Du, YR.(2000).Nuclear magnetic resonance relaxation studies of polyacrylamide solution.COLLOID AND POLYMER SCIENCE,278(3),264-269. |
| MLA | Mao, SZ,et al."Nuclear magnetic resonance relaxation studies of polyacrylamide solution".COLLOID AND POLYMER SCIENCE 278.3(2000):264-269. |
入库方式： OAI收割
来源：武汉物理与数学研究所
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