Thermal insulation materials based on polyurethane foam modified by the polymethylphenylsiloxane

In this work, the modification process of thermal insulation materials based on polyurethane foam by the organosilicon polymer polymethylphenylsiloxane was studied. The current state of thermal insulation materials based on polyurethanes problem and ways to improve the thermal and operational properties of foamed polyurethanes, such as maintaining the stability of characteristics under the influence of adverse factors, reducing moisture absorption and water absorption, were also analyzed. The influence of polymethylphenylsiloxane on the morphological characteristics and density of the resulting foams was studied. It was found that the introduced modifier affects the density of the resulting foam materials slightly. In this case, the introduction of an organosilicon product regardless of the ratio of the initial components leads to a decrease in water absorption. Studies have shown that the introduction of an organosilicon modifier in an amount of 2.5-5 m. h. leads to an increase in the heat resistance of the material. The heat resistance of modified samples increased by an average of 30-40 °C. Thus, the conducted research showed a real possibility of using the developed modified polyurethane foams for thermal insulation of industrial and civil objects.