Low-Field NMR Magnetisation Relaxation Experiments for Quality Control Purposes

11 Low-Field NMR Magnetisation Relaxation Experiments for Quality Control Purposes 

The high selectivity of solid-state NMR with respect to different phases/components in polymer materials can offer several advantages for quality tests over other analytical techniques. Although access to information on the use of NMR for quality-control purposes is rather limited, several applications for fast analysis of rubbery materials have been published, for example for determining the concentration of oil in rubbers 

The NMR method was found to offer the following advantages for quality tests  

Quality tests are usually performed using bench-top, low filed NMR spectrometers. Volume-average properties are determined with this equipment. Surface layer of samples can be analysed using recently developed NMR-MOUSE (mobile universal surface explorer) [26, 188]. The NMR-MOUSE is a relatively small NMR device suited for the investigation of surface-near volume elements. Lateral surface heterogeneity of elastomeric materials can be scanned with this device. Possible applications of the NMR-MOUSE for the characterisation of rubbery materials were demonstrated [26,189-191]. 

Principles of Polymer Chemistry, Cornell University Press, Ithaca, NY, USA, 1953. 

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