ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Use of infrared absorption spectroscopy for the determination of the degree of crystallization of polypropylene, prepared by stereospecific polymerization

I. Diačik and M. Jambrich

Forschungsinstitut für Chemiefasern in Svit

Abstract: The method is based on measurement of integrated extinction of 999 cm^-1 band corresponding to the crystn. range. For calcn. of the cryst. part, the 974 cm^-1 control band, governed by the Lambert-Beer law, is applied. A method for the detn. of the k value, expressing the relation between the cryst. part and the integrated effective extinction is given; k is 0.02380. The infrared absorption spectrum of isotactic polymer in fused state (200°) corresponds to the spectrum of the polymer of the Et₂O polypropylene fraction at normal temp. (20°). By comparing results of x-ray analysis and infrared absorption spectra, it was found that the polymer of the Et₂O fraction did not have 3-dimensional periodicity.

Full paper in Portable Document Format: 147a540.pdf (in Slovak)

Chemical Papers 14 (7) 540–546 (1960)