Effects of End Groups on Phase Transition and Segmental Mobility of Poly(N-isopropylacrylamide) Chains in D2O
文献类型：期刊论文
| 作者 | Ru, Geying1,2; Feng, Jiwen1 |
| 刊名 | JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS
 |
| 出版日期 | 2011-05-15 |
| 卷号 | 49期号:10页码:749-755 |
| 关键词 | end group mobility NMR phase transition poly(N-isopropylacrylamide) |
| 英文摘要 | Phase transition and mobility of poly(N-isopropylacrylamide) (PNIPA) chains with three different types of end groups (hydroxyl, carbon-carbon double bond, and camphoric sulfonic groups) have been studied by measurements of the normal H-1 NMR spectrum, spin-spin relaxation time, and 2D NOESY spectrum. It is found that at room temperature not only the end group parts but also the part of the PNIPA chain with hydroxyl end group have higher mobility than corresponding parts of PNIPA with double bond and camphoric sulfonic end groups. The lower critical solution temperatures (LCST) of PNIPAs modified with hydrophilic hydroxyl and hydrophobic double bond end groups are inversely dependent and directly dependent on the molecular weight of polymer respectively, whereas the LCST of PNIPA with the camphoric sulfonic end group bearing both hydrophobic and hydrophilic structures is independent of the molecular weight. The double bond end groups collapse simultaneously with inner segments of the PNIPA chain, whereas the hydroxyl and camphoric sulfonic end groups still exhibit higher mobility and do not shrink tightly after heating-induced collapsing of inner segments. It is suggested that the hydroxyl and camphoric sulfonic end groups locate on the surface of globules, but the double bond end groups are probably buried inside the globules. (C) 2011 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 49: 749-755, 2011 |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Polymer Science |
| 研究领域[WOS] | Polymer Science |
| 关键词[WOS] | TRANSFER RADICAL POLYMERIZATION ; MOLECULAR-WEIGHT ; N-ISOPROPYLACRYLAMIDE ; AQUEOUS-SOLUTIONS ; THERMAL RESPONSE ; RAFT POLYMERIZATION ; H-1-NMR RELAXATION ; NMR ; SEPARATION ; LCST |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000289444500008 |
| 公开日期 | 2015-12-01 |
| 源URL | [http://ir.wipm.ac.cn/handle/112942/8231]  |
| 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, State Key Lab Magnet Resonance & Atom & Mol Phys, Wuhan Ctr Magnet Resonance, Wuhan Inst Phys & Math, Wuhan 430071, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ru, Geying,Feng, Jiwen. Effects of End Groups on Phase Transition and Segmental Mobility of Poly(N-isopropylacrylamide) Chains in D2O[J]. JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS,2011,49(10):749-755. |
| APA | Ru, Geying,&Feng, Jiwen.(2011).Effects of End Groups on Phase Transition and Segmental Mobility of Poly(N-isopropylacrylamide) Chains in D2O.JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS,49(10),749-755. |
| MLA | Ru, Geying,et al."Effects of End Groups on Phase Transition and Segmental Mobility of Poly(N-isopropylacrylamide) Chains in D2O".JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS 49.10(2011):749-755. |
入库方式： OAI收割
来源：武汉物理与数学研究所
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