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

Abstract

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

CLC Number:

O482.53

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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