Study of the dissolution process of polystyrene in concentrated cyclohexane solution by MNR relaxation
文献类型：期刊论文
| 作者 | Mao, SZ; Feng, HQ |
| 刊名 | COLLOID AND POLYMER SCIENCE
 |
| 出版日期 | 1998-03-01 |
| 卷号 | 276期号:3页码:247-251 |
| 关键词 | NMR relaxation time cohesional entanglement polystyrene theta solvent |
| 英文摘要 | C-13-NMR relaxation times of polystyrene (PS) chains in its theta solvent, cyclohexane, have been measured at different temperatures. It was found that relaxation of carbon nuclei of the side-chain-phenyl groups and those of main chains have remarkably different temperature-dependent relaxation behaviors in the solvent. A two-step model for the dissolution process is proposed. According to the model, swelling of the polymer below theta temperature corresponds mainly to the gradual dispersion of the side-chain phenyl groups; while the complete dissolution above theta temperature corresponds mainly to the gradual dispersion of the main chains at a molecular level. These dispersions reflect the fact that cohesional interaction among sidechain-phenyl rings or main chains are weakened by solvent molecules, which shows the existence of the cohesional entanglements among polymer chains. The results of T-1(C) are confirmed by the biexponential dependence of H-1-NMR spin-spin relaxation on temperature. |
| 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] | POLYMER-SOLUTIONS ; NEUTRON-SCATTERING ; POINT |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000072985600007 |
| 公开日期 | 2015-12-01 |
| 源URL | [http://ir.wipm.ac.cn/handle/112942/8347]  |
| 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 | Chinese Acad Sci, Wuhan Inst Phys & Math, Lab Magnet Resonance & Atom & Mol Phys, Wuhan 430071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Mao, SZ,Feng, HQ. Study of the dissolution process of polystyrene in concentrated cyclohexane solution by MNR relaxation[J]. COLLOID AND POLYMER SCIENCE,1998,276(3):247-251. |
| APA | Mao, SZ,&Feng, HQ.(1998).Study of the dissolution process of polystyrene in concentrated cyclohexane solution by MNR relaxation.COLLOID AND POLYMER SCIENCE,276(3),247-251. |
| MLA | Mao, SZ,et al."Study of the dissolution process of polystyrene in concentrated cyclohexane solution by MNR relaxation".COLLOID AND POLYMER SCIENCE 276.3(1998):247-251. |
入库方式： OAI收割
来源：武汉物理与数学研究所
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