2020 (1) 2

https://doi.org/10.15407/polymerj.42.01.011

Influence of silica filler on cohesion-adhesion properties of nanostructurized polymer-polymer systems

L. MALYSHEVA, Institute of Macromolecular Chemistry NAS of Ukraine, 48, Kharkivske shose, Kyiv, 02160, Ukraine E-mail: malysheva_tat@ukr.net

ORCID: 0000-0002-3046-6819.

A. L. TOLSTOV, Institute of Macromolecular Chemistry NAS of Ukraine, 48, Kharkivske shose, Kyiv, 02160, Ukraine E-mail: a.tolstov@ukr.net

ORCID: 0000-0001-6016-9308.

E.V. GRES, Institute of Macromolecular Chemistry NAS of Ukraine, 48, Kharkivske shose, Kyiv, 02160, Ukraine

Polym. J., 2020, 42, no. 1: 11-18.

Section: Structure and properties.

Language: Russian.

Abstract:

Here we have studied an effect of a nature of adsorption-active surface of fine amorphous silica particles on cohesion-adhesion characteristics of nanostructurized blends of polyurethane elastomer (PU) with homo- or copolymers of vinyl chloride. A favorable stabilization effect on morphology of the polymer blends is provided by dense hydrogen (H-) bonding network between polymer constituents. In the silica-filled polymer blends a nano-dispersed phases of thermoplastic polymer and the filler are distributed in elastomeric matrix. Adsorption interaction of hydroxyls on the unmodified silica surface (Aerosil A-300TM) with carbonyls of polyurethane was identified by FTIR. It was found that water molecules adsorbed by a surface of hydrated silica (Lo-Vel 2003TM) or increased quantities of unmodified silica particles suppress an interaction between hydroxyls and carbonyls that was reflected in decreasing hydrogen-bonded C=O groups. Minor destabilizing impact on H-bonding network and reducing cohesion strength of the silica-filled polymer blends has hydrophobic surface of modified silica particles (Aerosil AM-300TM). Otherwise, highly hydroxylated polar surface of silicagel particles (Lo-Vel 2003TM) drastically decreases a stability of the polymer nanocomposites.

Keywords: nanocomposite, polyurethane elastomer, polymer of vinyl chloride, silica, mechanical strength.

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