| Abstract: | Successful chromatograms were obtained for trifluoroacetylated nylon 12 (N-TFA-N) in gel permeation chromatography (GPC) with dichloromethane as eluent. It was confirmed that the method of universal calibration was applicable for N-TFA-N and polystyrene. The average molecular weights of nylon 12 were obtained from the chromatogram of N-TFA-N by use of the calibration curve for polystyrene. The stability of N-TFA-N in solution was examined from various angles. Satisfactory results are obtained, if the sample solution is measured within 48 h after preparation. |
