Thermal Degradation Study of Polyethylene Using <sup>1</sup>H NMR

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  • Lee Chang Hoon
    Department of Physics, Korea University, Seoul 136–701, Korea
  • Lee Cheol Eui
    Department of Physics, Korea University, Seoul 136–701, Korea
  • Han Jae Hong
    Department of Materials Science, Korea University, Seoul 136–701, Korea
  • Suh Kwang S.
    Department of Materials Science, Korea University, Seoul 136–701, Korea

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  • Thermal Degradation Study of Polyethylene Using 1H NMR.

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We have studied the thermal degradation of polymer samples of low density polyethylene (LDPE) and crosslinked polyethylene (XLPE) by 1H nuclear magnetic resonance. The spin-lattice relaxation in these systems was explained using the two-phase model for semicrystalline polymers. It was found that the microscopic environments of the 1H nuclei due to thermal degradation were reflected in the spin-lattice relaxation times (T1) and the line shapes. The degree of crystallinity was also determined.

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