An influence of conditions for obtaining the new coal tar pitch composite materials on their heat resistance and mechanical strength
DOI:
https://doi.org/10.15587/1729-4061.2015.42185Keywords:
coal tar pitch, modification, filling, pitch composite, heat resistance, maximum bending stressAbstract
Coal tar pitch is a valuable product of high-temperature pyrolysis of coal - a non-renewable natural resource; therefore, skilled use of coal tar pitch is an actual problem.
Coal tar pitch is a unique product with a rich set of properties, including polymer. Using and managing the polymer properties of pitch allows to better exploit the chemical potential of the coal tar pitch by creating new competitive composite materials on its basis that can replace more expensive polymer and metal materials.
Modifying the coal tar pitch by active polymer additives in the low-temperature region allows to adjust and change the pitch properties, improve its heat resistance and mechanical strength. Introducing the filler into the pitch-polymer matrix significantly improves the technological and operating properties of the pitch composite.
Studies have shown that the influence of temperature and time conditions for obtaining the composite material on its properties appears significant due to the thermochemical transformations and structural changes in the pitch-active additives-filler system.
Using the mathematical modeling method, optimal process conditions, which allow to obtain the pitch composite with the bending strength of 42MPa were determined.
The pitch composite, filled with asbestos refers to low-combustible materials, which is an undoubted advantage compared to many thermoplastic polymers.References
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