A Rheological Model of the Influence of Thermal Exposure on the Viscosity of a an LBS-4 Varnish during Impregnation of a Multilayer Woven Blank of a Heat-Protective Coating.

Autor: Tarasov, V. A., Komkov, M. A., Romanenkov, V. A., Boyarskaya, R. V., Boyarskii, D. S.
Zdroj: Polymer Science -- Series D; Apr2018, Vol. 11 Issue 2, p179-182, 4p
Abstrakt: A rheological model of LBS-4 bakelite varnish that is used in the fabrication of heat-protective coatings of reentry spacecraft is developed on the basis of experimental data that highlight the dependence of the dynamic viscosity of a varnish on the duration of its long-term storage and thermal-exposure parameters (time and maximum temperature). This model is shown to be useful in the design of impregnation of woven-fiber blanks for the fabrication of composites. The relationships for evaluating the impregnation area under various technological conditions are described as well. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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