Apparatus to obtain flow rates (melt index) in plastics via fixed frequency, pulsed NMR
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United States of America Patent
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Nov 22, 1994
Grant Date -
N/A
app pub date -
Oct 15, 1992
filing date -
Oct 15, 1992
priority date (Note) -
Expired
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Abstract
A pulsed NMR analysis system and process comprising an air curtain (137), sample throughput system (P, LI, V1, V2) and user system controls (104) to establish digitized free induction decay curves (C) , from which components functions are determined using linear or nonlinear regression techniques to correlate the curve components to the target nuclei and to flow rates in plastic including MI and FRR for polyethylene and MF for polypropylene.
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