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Keywords:

  • FTIR-DSC;
  • identification;
  • polyolefine;
  • copolymer;
  • α-olefin

Abstract

A new method for identification of ethylene/α-olefin copolymer was established by Fourier Transform Infared (FTIR)–Differential Scanning Calorimetery (DSC) in this article. DSC and FTIR spectroscopy techniques were used to analysis the type and content of α-olefin in polyolefine copolymer. FTIR was available to identify the structures of polyethylene and copolymers of ethylene with different α-olefins. The type of polyethylene can be determined by the peak position of 1378 and 1369 cm−1. According to the peak location of 770, 784, and 895 cm−1, the type of α-olefin can also be determined. DSC method was used to decide the position of melting peaks. The quantitative investigation of the content of α-olefin in polyethylene was calculated by the formula: −ln(CH2 mol fraction) = −0.331+135.5/Tm. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009