Characterization of cross-link density in technical elastomers by the NMR-MOUSE

Zimmer, G.; Guthausen, Andreas; Blümich, Bernhard

doi:10.1016/s0926-2040(98)00061-7

Cited by 47 publications

(28 citation statements)

References 13 publications

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“…The graphs show the decay in height of the echoes is significantly faster for the old rubber sample which indicates a much shorter T2 eff for the old rubber than the new rubber as previously reported [13]. Having demonstrated the ability of the low power system, we show the ability to measure the spinlattice relaxation time using the Henry/KL405 amplifier and the constructed wetland sensor.…”

Section: Resultssupporting

confidence: 67%

Cost effective power amplifiers for pulsed NMR sensors

Newton

Hughes‐Riley

Morris

2015

Proceedings of 2nd International Electronic Conference on Sensors and Applications

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Sensors that measure magnetic resonance relaxation times are increasingly finding applications in areas such as food and drink authenticity and waste water treatment control. Modern permanent magnets are used to provide the static magnetic field in many commercial instruments and advances in electronics, such as field programmable gate arrays, have provided lower cost console electronics for generating and detecting the pulse sequence. One area that still remains prohibitively expensive for many sensor applications of pulsed NMR is the requirement for a high frequency power amplifier. With many permanent magnet sensors providing a magnetic field in the 0.25T to 0.5T range, a power amplifier that operates in the 10MHz to 20MHz rage is required. In this work we demonstrate that some low cost commercial amplifiers can be used, with minor modification, to operate as pulsed NMR power amplifiers. We demonstrate two amplifier systems, one medium power that can be constructed for less than Euro 100 and a second much high power system that produces comparable results to commercial pulse amplifiers that are an order of magnitude more expensive. Data is presented using both the commercial NMR MOUSE and a permanent magnet system used for monitoring the clog state of constructed wetlands.

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Section: Resultssupporting

confidence: 67%

Cost effective power amplifiers for pulsed NMR sensors

Newton

Hughes‐Riley

Morris

2015

Proceedings of 2nd International Electronic Conference on Sensors and Applications

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“…However, size constraints prevent this kind of sample to be inserted in a standard NMR probehead. A way out of this apparent dilemma is in prin- This idea has been put forward by others [21][22][23]. The very first industrial application of the MOUSE has been focussed on rubber-type objects such as tyres.…”

Section: Through Packaging Measurementsmentioning

confidence: 99%

Quality control with time-domain NMR

Todt

Burk

Guthausen

et al. 2001

Eur. J. Lipid Sci. Technol.

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“…In this respect phase encoding is of great advantage in the imaging process for specimens presenting a fast decaying signal, which are frequently found in solid-like materials and fluids in confined environments. The technique can then be extended to soft tissues and liquids, considering diffusion restrictions (13). In order to present the capabilities of the method, a nonvulcanized elastomer and a commercial rubber band were imaged using the MRI-MOUSE.…”

Section: Results and Discusionmentioning

confidence: 99%

“…Aside from on-line quality control applications, valuable chemical and physical information is retrieved for a wide range of materials. Just as in a conventional in-magnet experiment, relaxation times (10,11,13), signal intensity, and diffusion constants can be correlated to molecular dynamics and mobility, and to chemical and mechanical properties of a sample in a noninvasive fashion. Fields of study include a wide range of heterogeneous specimens with diverse compositions such as polymers, soft tissues, food products, and porous media.…”

Section: Introductionmentioning

confidence: 99%