Fourier transform infrared spectroscopy (FTIR) and carbon-13 solid state nuclear magnetic resonance spectroscopy (NMR) were used quantitatively (and nondestructively) to determine the starch content in a series of starch filled polyethylene samples (nominal addition levels range from 3 to 6 wt%). Data acquisition times (including sample preparation and instrument analysis) were typically a few minutes for both techniques. Current methodologies for starch analysis in polyethylene are based upon wet chemical te…
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