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学科主题: 高分子化学
题名: The Coil-to-Globule-to-Coil Transition of Linear Polymer Chains in Dilute Aqueous Solutions: Effect of Intrachain Hydrogen Bonding
其他题名: The Coil-to-Globule-to-Coil Transition of Linear Polymer Chains in Dilute Aqueous Solutions: Effect of Intrachain Hydrogen Bonding
作者: Zhou KJ(周科进) ; LU YIJIE ; Li JF(李军方) ; SHEN LEI ; Zhang GZ(张广照) ; Xie ZW(谢作伟) ; Wu Q(吴奇)
通讯作者: 张广照 ; 吴奇
刊名: Macromolecules
发表日期: 2008
卷: 41, 期:22, 页:8927-8931
收录类别: SCI
部门归属: 中国科技大学; 上海有机所沪港化学合成联合实验室; 香港中文大学
英文摘要: Our previous studies of the captioned transition have shown that thermally sensitive poly(N-isopropylacrylamide) (PNIPAM) in water can form stable individual single-chain globules, but not for polystyrene (PS) in cyclohexane. In the current study, using poly(N,N-diethylacrylamide) (PDEAM) (M-w = 1.7 x 10(7) g/Mol and M-w/M-n = 1.06) with no hydrogen donator site, we intend to find whether the intrachain hydrogen bonding plays a role in stabilizing individual collapsed PNIPAM single-chain globules. We found that PDEAM can also form stable single-chain globules in water even though the transition is less sharp. The resultant individual PDEAM single-chain globules are less compact, reflecting in a lower chain density and a higher ratio of the radius of gyration to hydrodynamic radius, presumably due to the lack of intrachain hydrogen bonding. Our result also shows that, unlike PNIPAM, there is no hysteresis in the transition, indirectly supporting our previous assumption that the hysteresis observed for PNIPAM is due to the formation of some intrachain additional hydrogen bonds formed in the collapsed state.
语种: 英语
相关网址: 查看原文
WOS记录号: WOS:000261003700088
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内容类型: 期刊论文
URI标识: http://ir.sioc.ac.cn/handle/331003/25307
Appears in Collections:上海有机化学研究所_期刊论文

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Recommended Citation:
Zhou KJ,LU YIJIE,Li JF,et al. The Coil-to-Globule-to-Coil Transition of Linear Polymer Chains in Dilute Aqueous Solutions: Effect of Intrachain Hydrogen Bonding[J]. Macromolecules,2008,41(22):8927-8931.
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