№2 (2017) 7

https://doi.org/10.15407/polymerj.39.02.115

Polymer blends based on polyurethane ionomer and chitosan

Sergiy Kobylinskyy, Volodymir  Shtompel’, Sergii Riabov

Institute of Macromolecular Chemistry NAS of Ukraine

48 Kharkivske shose, Kyiv, 02160, Ukraine

Polym. J., 2017, 39, № 2: 115-121.

Section: Synthesis polymers.

Language: English.

Abstract:

Polymer composites based on binary blends of a synthetic polyurethane cationomer (CPU) and the natural polymer – chitosan, with content ranges from 1 up to 75 wt % have been prepared. The structural morphology of binary blends of ion-containing polymers – polyurethane cationomer (CPU) and chitosan having protonated amino groups – have been studied using WAXS (wide angle X-rays scattering), SAXS (small angle X-rays scattering) methods and DSC (differential scanning calorimetry). The structural formation processes in the blends of two ion-containing polymers are shown to be controlled by the compatibility of their components. It has been established that the synthesized polyurethane cationomer (CPU) is an amorphous polymer and has pronounced microphase structure with spatial periodicity in the arrangement of its hard and soft domains. The Bragg distance (interdomain space distance) between similar (concerning their electronic density) domains (D) was determined to be 4,7 nm. Neat chitosan, having ionic (protonated) amino groups in its chain is shown to be an amorphous-crystalline polymer and there is no periodicity in spatial location of heterogeneous micro-areas (crystallites and amorphous micro-areas) in its structure.

Keywords: polymer composite, blends, morphology, polyurethane ionomer, chitosan, X-ray diffraction.

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