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

doi:10.19894/j.issn.1000-0518.210098

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.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

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

CLC Number:

Jiu-Geng CHENG, Zhao-Hui SU. Quantitative Analysis of Phase Composition of Poly (1-butene) /Polypropylene Blends by Atomic Force Microscopy-Infrared[J]. Chinese Journal of Applied Chemistry, 2022, 39(02): 266-271.

Figures/Tables 4

Fig.1 FT-IR spectra of PB and PP in the 4000～600 cm－1（A）and 1500～1300 cm－1（B）regions

Fig.2 FT-IR spectra in the 1500～1300 cm－1region of the PB／PP blends with different PB mass fractions（A）and FT-IR calibration curve for quantitative analysis of PB／PP blends（B）

Fig.3 AFM height image of a PB／PP blend containing 70% PB（A）and AFM-IR spectra of different phases acquired at the positions marked with the same colour

Table 3 PB contents in different phases

相区	平行样本数	PB质量分数均值	标准差
Phase	Replicates analyzed	Average PB mass fraction／%	Std Dev
PB-rich	8	78	17
PP-rich	10	19	16

References 19

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

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