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Laboratories of spectral methods

​Infrared spectroscopy is used for qualitative studies such as:

  • ​identification of polymer materials, stabilisers and additives
  • general identification of substances and purity determinations
  • FTIR spectroscopy
  • identification of small objects in materials with IR microscopy Continuum from size 15x15μm
and for quantitative studies, namely:

  • ​determination of composition of copolymers, additive content in polymers, monitoring degradative changes in polymer
  • degree of branching, degree of crystallinity of semicrystalline polymers, dichroic ratio in oriented polymers
UV-VIS-NIR spectroscopy is employed mainly for:

  • ​determination of purity degree of organic solvents
  • photometric control of stabiliser dosage in PP and PE
  • determination of -OH groups in silica supports
  • determination of polystyrene content in styrene (ASTM D2121)
  • determination of p-tert-butylcatechol in styrene (ASTM D4590)
  • spectrophotometric determination of some metals
NMR spectroscopy - examples of use:

  • ​structure identification, purity determination, degree of deuteration
  • determination of isomerisation degree of polymer chains
  • branching of polymers, detection, identification and quantification of branches
  • structural defects of macromolecules, tacticity determination
  • analysis of propylene/ethylene or other 1-olefin copolymers, determination of number average molecular weight by means of quantitative end group analysis
A​tomic absorption spectroscopy (AAS)
AAS is used for the qualitative and quantitative determination of metals. Possible applications: analysis of the catalytic systems, traces of catalyst residues in polymers, content of fillers, determination of metals in fillers etc. 

Atomic absorption spectroscopy with electrothermal analysis (ETA-AAS)
Electrothermal analysis AAS in connection with microwaves decomposition is able to determine traces of metals at ppb levels. Possible application: determination of impurities in monomers. 
 
 
 
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