SYSTEMATICAL ANALYSIS OF THE CLIMATICS INFLUENCE ON MECHANICAL PROPERTIES OF THE POLYMER COMPOSITE MATERIALS BASED ON DOMESTIC AND FOREIGN SOURCES (review)

The Influence of Internal Stresses on the Aging of Polymer Composite Materials: a Review

“…PCMs are sensitive to moisture [11][12][13][14][15][16][17]. Along with plasticization, additional curing, and hydrolysis [38] of polymer matrices, the moisture saturation of PCMs is accompanied by their swelling.…”

“…The examples considered illustrate the noticeable effect of internal stresses on changes in the mechanical parameters of PCMs at the initial stages of aging (thermal [24, 25, 53-55, 66, 74], thermal and humid [25,[61][62][63][64][65]67], climatic [8][9][10][11][12][13][14][15][16][17], [23,27], and in open space [72]), when the threshold number N 0 of thermal cycles was exceeded. However, due to relaxation of internal stresses at later stages, a certain limiting state of physicochemical transformations and microfaults is reached [49], and then the change in the indices of material characteristics is significantly reduced.…”

“…When considering the causes for aging of polymer composite materials (PCMs) based on thermosetting binders mentioned in the foreign [1][2][3][4][5][6][7] and domestic [8][9][10][11][12][13][14][15][16][17] literature, the influence of temperature, humidity, solar radiation, oxygen, chemically active substances, erosion, precipitation on condition of matrices, reinforcing fillers, polymer-filler interfaces are discussed. Under the influence of these factors, destruction, hydrolysis, additional hardening, swelling, plasticization, structural relaxation and other physicochemical transformations occur in them, which accelerate or slow down the changes in their mechanical parameters [16]. In recent years, an in-depth analysis of significant factors affecting the properties of PCM has been carried out [5,[17][18][19][20][21][22]; however, when discussing the regularities observed, an insufficient attention is paid to such an important factor of influence as the action of internal stresses [23].…”

Restoring bearing capacity of fiberglass overwrap of aviation cylinders for storing liquids, gases and fire – extinguishing compounds

“…Як свідчить досвід і результати досліджень, експлуатація балонів супроводжується деградацією механічних властивостей СО внаслідок впливу кліматичних чинників [3] та механічних пошкоджень, які відображені на рис. 1.…”

Prediction of Durability of Thermal Insulating Epoxy Coatings with Regard to Climatic Ageing

“…Assessing the influence of climatic factors on the properties of a polymer composite is a complex task, as only some of the following can be evaluated in full-scale operating conditions: color, gloss, hardness, and surface condition [14][15][16][17].…”