Journal of Applied Polymer Science, Vol.92, No.2, 722-727, 2004
A novel method for the preparation of monocarboxyl-end-grouped polycaprolactam with an adjustable molecular weight
A novel method was used to synthesize adjustable-molecular-weight polycaprolactams with monocarboxyl end groups. The reaction device and conditions are discussed. The products were characterized by Fourier transform infrared spectroscopy, H-1-NMR spectroscopy, high-resolution pyrolysis gas chromatography-mass spectrometry, and wide-angle X-ray diffraction. The thermal properties were studied by differential scanning calorimetry and thermogravimetric analysis. (C) 2004 Wiley Periodicals, Inc.