POSS纳米复合物链运动的固体NMR研究

波谱学杂志 ›› 2012, Vol. 29 ›› Issue (2): 248-257.

POSS纳米复合物链运动的固体NMR研究

邹琴^1，2，申万岭¹，高秀枝¹，邓风^1*

1. 波谱与原子分子物理国家重点实验室，武汉磁共振中心(中国科学院武汉物理与数学研究所)，湖北武汉 430071；
2. 中国科学院研究生院，北京 100049

收稿日期:2011-05-19 修回日期:2011-07-05 出版日期:2012-06-05 发布日期:2012-06-05
基金资助:
国家自然科学基金资助项目（20933009）.

A Solid-State NMR Study on the Segmental Motion of Polyhedral Oligomeric Silsequi-Oxane(POSS) Nanocomposites

ZOU Qin^1，2, SHEN Wan-Ling¹, GAO Xiu-Zhi¹, DENG Feng^1*

1. State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Center for Magnetic Resonance (Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences), Wuhan 430071, China;
2. Graduate School of the Chinese Academy of Sciences, Beijing 100049, China

Received:2011-05-19 Revised:2011-07-05 Online:2012-06-05 Published:2012-06-05
Supported by:
国家自然科学基金资助项目（20933009）.

摘要/Abstract

摘要：

利用固体NMR技术、并结合TEM技术研究了POSS掺杂到不同聚合物体系后POSS复合物的链段运动及结构特点，其中聚合物包括聚甲基丙烯酸正丁酯（PBMA）和聚甲基丙烯酸甲酯（PMMA）. 实验结果表明：POSS能很好的分散在这2种聚合物中，形成纳米结构的复合物；其中POSS在PBMA中形成的复合物表现出较强的链段运动性，而在PMMA中则表现出较低的运动性；同时，2D HETCOR的结果表明这2种聚合物本身结构特点不同，POSS/PBMA复合物中聚合物部分与POSS部分间的距离较近，而在POSS/PMMA中则较远.

关键词: 固体核磁共振(solid-state NMR), 链运动, 弛豫时间, POSS纳米复合物

Abstract:

The segmental motions of two nanocomposites, in which polyhedral oligomeric silsequi-oxane (POSS) is respectively copolymerized with n-butyl methacrylate (BMA) and methyl methacrylate (MMA), were investigated by solid-state NMR techniques in combination with transmission electron microscopy (TEM). The results indicated that the POSS molecules are thoroughly dispersed in the two polymer matrix. The POSS/PMMA and POSS/PBMA nanocomposites showed a homogenous structure with almost one component, and the segmental motions more constrained in the POSS/PMMA nanocomposite than the POSS/PBMA nanocomposite. The 2D HETCOR results indicated the distance between the polymer and POSS unit is shorter in the POSS/PBMA nanocomposite than in the POSS/PMMA nanocomposite.

Key words: solid-state NMR, segmental motion, relaxation time, POSS nanocomposite

中图分类号:

O482.53

邹琴, 申万岭, 高秀枝, 邓风. POSS纳米复合物链运动的固体NMR研究[J]. 波谱学杂志, 2012, 29(2): 248-257.

ZOU Qin, SHEN Wan-Ling, GAO Xiu-Zhi, DENG Feng. A Solid-State NMR Study on the Segmental Motion of Polyhedral Oligomeric Silsequi-Oxane(POSS) Nanocomposites[J]. Chinese Journal of Magnetic Resonance, 2012, 29(2): 248-257.

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