Chapter 20 - Polymer gel systems
作者： Hidekazu Yasunaga , Masatoshi Kobayashi , Shingo Matsukawa
DOI: 10.1016/S0167-6881(98)80028-1
关键词: Proton 、 Relaxation (NMR) 、 Nuclear magnetic resonance spectroscopy 、 Chemistry 、 Dipole 、 Polymer 、 Anisotropy 、 Side chain 、 Analytical chemistry 、 Chemical physics 、 Molecule
摘要: High-resolution solid-state nuclear magnetic resonance (NMR) techniques are powerful means for characterizing the network polymer of gel systems. This chapter reviews researches on synthesized gels by high-resolution NMR techniques. Rapid isotropic tumbling molecules is restrained polymers in state. A proton dipolar broadening many kilohertz observed an spectrum because strong dipolar-dipolar interaction and chemical shift anisotropy as a result restraint molecular motion. One method used removal to employ high-power decoupling field. The 13 C- 1 H scalar couplings removed (DD) resolution-improved obtained. relaxation times measured get information motion main side chains relationship between structure well sol-gel transition studied through measurements.
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