Aging of Basalt Plastics in Open Climatic Conditions

Старцев, О. В.; Лебедев, М. П.; Кычкин, А. К.

doi:10.1134/s1995421222010191

Cited by 2 publications

(6 citation statements)

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“…A decrease in temperature by 1 °C increases the pressure by 1.13 MPa. A decrease in air temperature to −60 °C in Yakutsk conditions can increase the internal stresses in PCMs with capillary-condensed moisture to 68 MPa, which exceeds the level of across-the-thickness gradient for a number of PCMs [ 20 ] and is another cause of microcracks and the reduction of strength indicators kR.…”

Section: The Role Of the Main Factors On The Uneven Aging Of Pcmmentioning

confidence: 99%

“…Affected by these factors, materials age and their mechanical properties deteriorate. Extensive data on the effects of PCM aging have been accumulated, including those in [ 10 , 13 , 20 , 21 , 22 ].…”

Section: Introductionmentioning

confidence: 99%

“…To clarify the causes of PCM aging the following effects are usually studied: plasticization of polymer matrices by atmospheric moisture [ 33 , 34 ]; swelling (increase in thickness) of samples when adsorbing moisture [ 35 ]; destruction of polymer matrices affected by solar UV radiation and air oxygen [ 32 , 36 ]; hydrolysis of polymer matrices affected by moisture [ 37 , 38 , 39 ]; recoating of polymer matrixes under the influence of temperature and the plasticizing effect of moisture [ 20 , 39 , 40 ]; misorientation of organic fibers affected by solar UV radiation, thermal and moisture cycling, and mechanical loads [ 39 ]; structural relaxation and shrinkage of the fibers forming the frame of the reinforcing filler [ 20 , 39 , 40 ]; physical aging and structural relaxation of polymer matrices [ 41 , 42 ]. …”

Section: Introductionmentioning

confidence: 99%

“…recoating of polymer matrixes under the influence of temperature and the plasticizing effect of moisture [ 20 , 39 , 40 ];…”

Section: Introductionmentioning

confidence: 99%

“…structural relaxation and shrinkage of the fibers forming the frame of the reinforcing filler [ 20 , 39 , 40 ];…”

Section: Introductionmentioning

confidence: 99%

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Contributing Factors of Uneven Climatic Aging for Polymeric Composite Materials: Methods and Modelling

et al. 2023

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Regarding a wide variety of PCMs, the materials’ strength properties which decrease no more than 20% after 30 years of operation are of special interest. One of the important regularities of the climatic aging of PCMs is the formation of gradients of mechanical parameters across the thickness of the plates. The occurrence of gradients must be taken into account when modeling the strength of PCMs for long periods of operation. At present, there is no scientific basis for the reliable prediction of the physical-mechanical characteristics of PCMs for a long period of operation in the world of science. Nevertheless, “climatic qualification” has been a universally recognized practice of substantiating the safe operation of PCMs for various branches of mechanical engineering. In this review, the influence of solar radiation, temperature, and moisture according to gradients of mechanical parameters across the thickness of the PCMs are analyzed according to the data of dynamic mechanical analysis, linear dilatometry, profilometry, acoustic emission, and other methods. In addition, the mechanisms of uneven climatic PCM aging are revealed. Finally, the problems of theoretical modeling of uneven climatic aging of composites are identified.

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Section: The Role Of the Main Factors On The Uneven Aging Of Pcmmentioning

confidence: 99%