Morphological Peculiarities of Isotactic Polypropylene Nucleated with Alkaline Earth Metal Pimelates

Janevski, Aco and Najdoski, Metodija and Stojkovikj, Sasho and Bogoeva-Gaceva, Gordana and Stefov, Viktor (2024) Morphological Peculiarities of Isotactic Polypropylene Nucleated with Alkaline Earth Metal Pimelates. In: 27th Congress of the Society of Chemists and Technologists of Macedonia (SCTM), 25-28 Sep 2024, Ohrid.

	Text (Congress Abstract) Abstract_27th Congress SCTM Ohrid 2024.pdf - Published Version Download (1MB)
	Other (Congress Poster) 27th Congress 2024 _SCTM Nukleiran iPP.pdf - Published Version Download (1MB)

Abstract

The alpha- and betha-phases are technologically interesting crystalline forms of isotactic polypropylene (iPP). For homopolymers, the alpha-phase is most thermodynamically stable with a monoclinic crystal structure. In contrast, the betha- phase is usually obtained by specific nucleation. In this work morphological characteristics of iPP, crystalized with Ca-, Ba-, Sr- and Mg-pimelates, as nucleators, were studied by scanning probe microscopy (SPM). SPM showed that all samples are covered with micro-sized particles. The highest particle coverage was achieved using Ca-, while the lowest when using Mg-pimelate, as a nucleator, showing that Ca-pimelate exhibits the highest nucleation capacity. The particles and the background surface were probed with Raman spectroscopy, revealing identical spectra for all samples, hence suggesting that the nuclei are buried in the particles. Finaly, the XRD analysis showed that the dominance of β-phase correlates with the particles coverage which is observable when using Ca-, Ba- and Sr-pimelates as nucleators, while the α-phase dominates in the case of Mg-pimelate.

Keywords: polypropylene, pimelates, morphology-structure correlations

Item Type:	Conference or Workshop Item (Poster)
Subjects:	Engineering and Technology > Chemical engineering Natural sciences > Chemical sciences Engineering and Technology > Materials engineering
Divisions:	Faculty of Technology
Depositing User:	Saso Stojkovik
Date Deposited:	07 Oct 2024 10:37
Last Modified:	07 Oct 2024 10:37
URI:	https://eprints.ugd.edu.mk/id/eprint/34774

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