原子力-红外光谱定量分析聚1-丁烯／聚丙烯共混物的相区组成.

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. [ABSTRACT FROM AUTHOR]