Chinese Journal of Applied Chemistry ›› 2022, Vol. 39 ›› Issue (02): 266-271.DOI: 10.19894/j.issn.1000-0518.210098

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Quantitative Analysis of Phase Composition of Poly (1-butene) /Polypropylene Blends by Atomic Force Microscopy-Infrared

Jiu-Geng CHENG1,2, Zhao-Hui SU1,2()   

  1. 1.State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
    2.University of Science and Technology of China, Hefei 230026, China
  • Received:2021-03-05 Accepted:2021-05-25 Published:2022-02-10 Online:2022-02-09
  • Contact: Zhao-Hui SU
  • Supported by:
    National Natural Science Foundation of China(52073277)

Abstract:

Crystallization of poly (1-butene) (PB) can be manipulated by addition of isotactic polypropylene (PP), and therefore PB/PP blends have attracted considerable attention. Despite many studies on this system in the literature, the miscibility of the two components remains a controversy. In the present paper, we investigated the compositions of the micro phases in PB/PP blends by atomic force microscopy-infrared (AFM-IR). A Fourier transform infrared (FT-IR) quantitative analysis method was first established to determine the PB content in a PB/PP blend based on the peak area ratio of the 1460 cm-1band to the 1378 cm-1band, and then taking advantage of the consistency between the AFM-IR and the FT-IR spectra, the calibration was applied to extract the micro phase composition from the AFM-IR spectra acquired for the micro phases. It is found that a PB/PP blend containing 70% mass fraction of PB phase separates into a PB-rich phase and a PP-rich one, with PB mass fractions of 78% and 19%, respectively, indicating that the two components are partially miscible to one another.

Key words: Poly (1-butene), Polypropylene, Fourier transform infrared, Atomic force microscopy-infrared, Phase composition

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