Process NMR

Polystyrene-Butadiene Rubbers

Here are a number of slides showing the information that can be obtained from high resolution 1H process NMR spectra taken at 57.3 MHz

These samples represent finished polymer in hexane solution. The quality of the hexane changes in the process as does the absolute solvation ratio. This means that chemometric approaches will have a difficult time performing these analyses. The advantage of the process NMR is that the olefin and aromatic regions of the spectrum are distinct and the intensity of these groups can be used to directly measure :
  • monomer ratios
  • internal/terminal olefin ratios
  • residual olefin content
  • hydrogenation level
  • polystyrene block percent
 BTX and Detailed GC Analysis by <sup>1</sup>H Process NMR
 BTX and Detailed GC Analysis by <sup>1</sup>H Process NMR
 BTX and Detailed GC Analysis by <sup>1</sup>H Process NMR
 BTX and Detailed GC Analysis by <sup>1</sup>H Process NMR
 BTX and Detailed GC Analysis by <sup>1</sup>H Process NMR
 BTX and Detailed GC Analysis by <sup>1</sup>H Process NMR

For more information on this topic please contact:
John Edwards
Manager, Process and Analytical NMR Services
Process NMR Associates LLC,
87A Sand Pit Rd
Danbury, CT 06810, USA
Tel: (203) 744-5905
 
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