DOI: https://doi.org/10.20535/1810-0546.2017.6.114262

Thermomechanical and Deformation Properties of Composites Based on the System of Dimethacrylate–Tetraethoxysilane

Galyna I. Khovanets', Olena Yu. Makido, Yuriy G. Medvedevskykh

Abstract


Background. The appearance of interphase interaction, the geometric limitations of the polymer polymerization space, the polymer free volume growth upon the addition of an inorganic component all affect the physicochemical and mechanical properties of the composites. However, the interrelation of the initial components with the composite properties is of an individual nature and requires experimental study.

Objective. The aim of the paper is the investigation of the effect of the composition of hybrid organo-inorganic composites (HOIC) based on the a,w-dimethacryloyl (tridietilenoksidtereftalat) (MGF-9) – tetraethoxysilane (TEOS) system on their thermomechanical and deformation properties and molecular structure.

Methods. Polymer-silica composites were prepared by the method of photoinitiated polymerization in the block using the laser interferometer and the sol-gel method. Thermomechanical analysis was performed on the device for determining the heat resistance of polymeric materials "Heckert" and the values of the characteristic parameters of the investigated composites of the MGF-9–TEOS system were calculated. The deformation properties of the composites were determined on the Heppler consistometer, calculating the parameter of the surface microhardness (conical point of fluidity).

Results. The dependence of the deformation and thermomechanical properties of composites on the ratio of the organic and inorganic components of the system was confirmed.

Conclusions. It is shown that the introduction of an inorganic filler into the polymer matrix improves the thermomechanical and deformation properties of the composites. It was established that the maximum thermomechanical stability and strength has the composition of MGF-9:TEOS = 90:10 % vol.


Keywords


Organo-inorganic composite; Sol-gel synthesis; Photoinitiated polymerization; Thermomechanical analysis; Microhardness

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