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Solid phase peptide synthesis (SPPS) of H-(Ala) n Lys-OH with n up to 10 is performed on a TentaGel(R) resin. The linker is (p-(hydroxymethyl)phenoxy) acetic acid (HMPA) and 9-fluorenylmethyloxycarbonyl (Fmoc) is used as the N-α-protecting group. For each step in the synthesis near-infrared-(NIR)-Fourier transform-(FT)-Raman spectra with an excitation wavelength at 1064 nm are obtained of...
The copolymerisation of styrene and vinyl imidazole was studied online using a unique Raman cell. The copolymerisation parameters, r 1 and r 2 , were obtained and compared with values obtained from NMR and elemental analysis. The problems associated with the technique and the data processing are discussed. Although there was poor correlation between techniques it was concluded that...
Emulsion polymerization of vinylacetate was studied to monitor the reaction on-line by the near infrared FT-Raman technique. The experimental conditions for monitoring the reaction by Raman spectroscopy were determined and discussed with regard to their applicability to industrial production of the polymer. The reaction goes to approximately 90% completion in 50 min and the polymerization can be succesfully...
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