HR/MAS高分辨魔角微量探头用于天然橡胶固体1H、13C NMR测试及其与液体BBO探头、固体CP/MAS探头测试的比较

采用BRUKER高分辨魔角微量探头（HR/MAS），液相宽带BBO探头和固体CP/MAS探头，对天然橡胶固体、乳液以及天然橡胶溶于氘代苯的溶液进行了¹H、¹³C 1D和2D NMR谱的测试和比较. 发现HR/MAS探头用于天然橡胶固体和乳液时可以得到高分辨的¹H、¹³C谱，克服了CP/MAS探头测试固体¹³C NMR谱或者是固体¹H NMR谱时，谱图存在S/N值可能较小、谱峰可能宽化的弱点.

1H AND 13C NMR STUDY OF NATURAL RUBBER USING A HIGH RESOLUTION MAGIC ANGLE SPINNING PROBE: A COMPARISON STUDY

D/2D 1H and 13 C NMR spectra of solid natural rubber, natural rubber latex and dissolved natural rubber in liquid phase were acquired using a BRUKER high resolution magic angle spinning (HR/MAS) probe, a BRUKER solution broad bore (BBO) probe and a BRUKER solid CP/MAS probe. The results obtained from the three probes were compared. The results showed that high resolution 1H and 13 C spectra could be obtained for solid nature rubber and rubber latex by using the HR/MAS probe, suggesting that the HR/MAS probe, in terms of signal to noise ratio and signal line width, is more advantageous than the CP/MAS probe for NMR studies on solid natural rubber.