| 초록 |
This work is concerned with the feasibility of achieving emulsion polymerizated polyacrylonitrile copolymer systems as precursors for the manufacture of carbon fibers. Identification of suitable comonomers and achieving the optimum content of the comonomer were some of the main objectives of this investigation. It was seen that methyl acrylate (MA) was found to be suitable for enabling the emulsion polymerization of polyacrylonitrile (PAN), in terms of particle stability, time stability. The acrylonitrile containing 0, 5, 10 and 15 mole% comonomer, methyl acrylate have been polymerizated by emulsion polymerization. Surface and bulk characterizations of the particles were performed by methods such as scanning electron microscopy(SEM), fourier transform-infrared(FT-IR) spectroscopy, and nuclear magnetic resonance(NMR). The molecular weight of polyacrylonitrile copolymer was measured by gel permeation chromatography. |
