The first observation, according to the best of knowledge, of a high-resolution 17.735-MHz 1 H NMR spectrum of uncured Heva rubber in a CS 2 solution was made in 1957 by Gutowsky et al., ...

School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China, Wuhan Center for Magnetic Resonance, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, ...