Miscibility in blends of poly(methyl methacrylate) and poly(silyl ether) as investigated by DSC and C-13 CP/MAS NMR spectroscopy

作者：Zheng, SX^*; Li, JH; Gao, R; Guo, QP

来源：Journal of Macromolecular Science Part B-Physics, 2003, B42(2): 351-365.

DOI：10.1081/MB-120017124

• poly(silyl ether) poly(methyl methacrylate)
• blends
• miscibility
• solid state NMR

Miscibility and phase behavior in blends of poly(silyl ether) (PSE) and poly(methyl methacrylate) (PMMA) were investigated by thermal analysis and high-resolution solid-state nuclear magnetic resonance (NMR) spectroscopy. The blends displayed single, composition-dependent glass transition temperatures (T-g's), indicating that the blend system is miscible for all compositions. To examine the miscibility at the molecular level, high-resolution solid-state C-13 NMR spectroscopy was used. The proton spin-lattice relaxation time T-1(H) and the proton spin-lattice relaxation time in the rotating frame T-1p(H) were measured via C-13 cross-polarization/magic angle spinning NMR as functions of blend compositions. In light of the proton spin-lattice relaxation parameters, it is concluded that the PSE and PMMA chains are intimately mixed on the scale of 20-30 Angstrom.

• 出版日期2003
• 单位上海交通大学