ФІЗИКО-ХІМІЧНІ ТА МЕХАНІЧНІ ХАРАКТЕРИСТИКИ ЕПОКСИУРЕТАНОВИХ КОМПОЗИТІВ
Epoxy urethane composites (EU) have been developed based on polyisocyanate (PIC), epoxy resin (ED-20), and sodium silicate (SS). The results of the study of the influence of the ratio of the components of the EU on their thermophysical and physicomechanical characteristics are presented. The method...
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| Date: | 2020 |
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V.I.Vernadsky Institute of General and Inorganic Chemistry
2020
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| Online Access: | https://ucj.org.ua/index.php/journal/article/view/218 |
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oai:ojs2.1444248.nisspano.web.hosting-test.net:article-2182020-09-28T12:34:41Z THERMOPHYSICAL AND PHYSICO-MECHANICAL CHARACTERISTICS OF EPOXYURETHANE COMPOSITES ТЕПЛОФИЗИЧЕСКИЕ И ФИЗИКО-МЕХАНИЧЕСКИЕ ХАРАКТЕРИСТИКИ ЭПОКСИУРЕТАНОВЫХ КОМПОЗИТОВ ФІЗИКО-ХІМІЧНІ ТА МЕХАНІЧНІ ХАРАКТЕРИСТИКИ ЕПОКСИУРЕТАНОВИХ КОМПОЗИТІВ Yashenko, Larisa epoxy urethane composites, density, thermophysical properties, mechanical characteristics, water absorption. Epoxy urethane composites (EU) have been developed based on polyisocyanate (PIC), epoxy resin (ED-20), and sodium silicate (SS). The results of the study of the influence of the ratio of the components of the EU on their thermophysical and physicomechanical characteristics are presented. The method ofdifferential scanning calorimetry revealed thatthese systems do not have clear temperature transitions, which indicates a fairly homogeneous and rigid structure. Studies of thermal properties by the method of dynamic thermogravimetry have shown that as the amount of sodium silicate increases, the temperature of the onset of decomposition of the EU is shifted by 20 ° C towards lower temperatures. At the same time, there is a slowdown in the decomposition of epoxy urethanes (weight loss is 12-14%), due to the presence of heterocyclic isocyanurate fragments, which is inherent in its own high thermal stability. The mechanical properties of the EU, such as compressive strength, modulus of elasticity, relative compression deformation, flexural strength, and water absorption, are determined depending on the ratio of components. High mechanical properties are shown regardless of the inorganic component amount. The modulus of elasticity, strength, and relative deformation in compression is in the range of 1916.4 - 4187.6 MPa, 117.4 - 133.1 MPa, and 24.7-30.4%, respectively. The highest flexural strengths are characterized by the EC composition of the PIC / SS / ED-20 = 80/20/20, and the lowest - the EC composition of the PIC / SS / ED-20 = 70/30/20. The results of the studies show that, by changing the ratio of organic and inorganic constituents in the EC, it is possible to regulate the thermal stability and physicomechanical properties of epoxy urethane composites depending on their purpose. V.I.Vernadsky Institute of General and Inorganic Chemistry 2020-09-15 Article Article Physical chemistry Физическая xимия Фізична xімія application/pdf https://ucj.org.ua/index.php/journal/article/view/218 10.33609/2708-129X.86.8.2020.134-143 Ukrainian Chemistry Journal; Vol. 86 No. 8 (2020): Ukrainian Chemistry Journal; 134-143 Украинский химический журнал; Том 86 № 8 (2020): Украинский химический журнал; 134-143 Український хімічний журнал; Том 86 № 8 (2020): Український хімічний журнал; 134-143 2708-129X 2708-1281 en https://ucj.org.ua/index.php/journal/article/view/218/123 |
| institution |
Ukrainian Chemistry Journal |
| baseUrl_str |
|
| datestamp_date |
2020-09-28T12:34:41Z |
| collection |
OJS |
| language |
English |
| topic_facet |
epoxy urethane composites density thermophysical properties mechanical characteristics water absorption. |
| format |
Article |
| author |
Yashenko, Larisa |
| spellingShingle |
Yashenko, Larisa ФІЗИКО-ХІМІЧНІ ТА МЕХАНІЧНІ ХАРАКТЕРИСТИКИ ЕПОКСИУРЕТАНОВИХ КОМПОЗИТІВ |
| author_facet |
Yashenko, Larisa |
| author_sort |
Yashenko, Larisa |
| title |
ФІЗИКО-ХІМІЧНІ ТА МЕХАНІЧНІ ХАРАКТЕРИСТИКИ ЕПОКСИУРЕТАНОВИХ КОМПОЗИТІВ |
| title_short |
ФІЗИКО-ХІМІЧНІ ТА МЕХАНІЧНІ ХАРАКТЕРИСТИКИ ЕПОКСИУРЕТАНОВИХ КОМПОЗИТІВ |
| title_full |
ФІЗИКО-ХІМІЧНІ ТА МЕХАНІЧНІ ХАРАКТЕРИСТИКИ ЕПОКСИУРЕТАНОВИХ КОМПОЗИТІВ |
| title_fullStr |
ФІЗИКО-ХІМІЧНІ ТА МЕХАНІЧНІ ХАРАКТЕРИСТИКИ ЕПОКСИУРЕТАНОВИХ КОМПОЗИТІВ |
| title_full_unstemmed |
ФІЗИКО-ХІМІЧНІ ТА МЕХАНІЧНІ ХАРАКТЕРИСТИКИ ЕПОКСИУРЕТАНОВИХ КОМПОЗИТІВ |
| title_sort |
фізико-хімічні та механічні характеристики епоксиуретанових композитів |
| title_alt |
THERMOPHYSICAL AND PHYSICO-MECHANICAL CHARACTERISTICS OF EPOXYURETHANE COMPOSITES ТЕПЛОФИЗИЧЕСКИЕ И ФИЗИКО-МЕХАНИЧЕСКИЕ ХАРАКТЕРИСТИКИ ЭПОКСИУРЕТАНОВЫХ КОМПОЗИТОВ |
| description |
Epoxy urethane composites (EU) have been developed based on polyisocyanate (PIC), epoxy resin (ED-20), and sodium silicate (SS). The results of the study of the influence of the ratio of the components of the EU on their thermophysical and physicomechanical characteristics are presented. The method ofdifferential scanning calorimetry revealed thatthese systems do not have clear temperature transitions, which indicates a fairly homogeneous and rigid structure. Studies of thermal properties by the method of dynamic thermogravimetry have shown that as the amount of sodium silicate increases, the temperature of the onset of decomposition of the EU is shifted by 20 ° C towards lower temperatures. At the same time, there is a slowdown in the decomposition of epoxy urethanes (weight loss is 12-14%), due to the presence of heterocyclic isocyanurate fragments, which is inherent in its own high thermal stability. The mechanical properties of the EU, such as compressive strength, modulus of elasticity, relative compression deformation, flexural strength, and water absorption, are determined depending on the ratio of components. High mechanical properties are shown regardless of the inorganic component amount. The modulus of elasticity, strength, and relative deformation in compression is in the range of 1916.4 - 4187.6 MPa, 117.4 - 133.1 MPa, and 24.7-30.4%, respectively. The highest flexural strengths are characterized by the EC composition of the PIC / SS / ED-20 = 80/20/20, and the lowest - the EC composition of the PIC / SS / ED-20 = 70/30/20. The results of the studies show that, by changing the ratio of organic and inorganic constituents in the EC, it is possible to regulate the thermal stability and physicomechanical properties of epoxy urethane composites depending on their purpose. |
| publisher |
V.I.Vernadsky Institute of General and Inorganic Chemistry |
| publishDate |
2020 |
| url |
https://ucj.org.ua/index.php/journal/article/view/218 |
| work_keys_str_mv |
AT yashenkolarisa thermophysicalandphysicomechanicalcharacteristicsofepoxyurethanecomposites AT yashenkolarisa teplofizičeskieifizikomehaničeskieharakteristikiépoksiuretanovyhkompozitov AT yashenkolarisa fízikohímíčnítamehaníčníharakteristikiepoksiuretanovihkompozitív |
| first_indexed |
2025-09-24T17:43:34Z |
| last_indexed |
2025-09-24T17:43:34Z |
| _version_ |
1849658095406415872 |