Physico-Mechanical Properties of Epoxy-Rubber Compositions Cured with Cardo Polyarylate
Abstract: The physico-mechanical properties of mixtures of cardo polyarylate with ED-20 epoxy resin and the products of its preliminary esterification reaction with butadiene acrylonitrile rubber with terminal carboxyl groups of the SKN-30 KTR brand were studied in a wide range of concentrations. Polyester of terephthalic acid and phenolphthalein was used as a cardo polyarylate. The combination of polyarylate with epoxy products was carried out through their joint solution in chloroform, followed by solvent evaporation and drying of the obtained films in vacuum at 3 mmHg at 353 K. The samples were cured at 453 K for 8h. It was found that the introduction of the initial resin ED-20 and the products of its interaction with rubber (PRE) into polyarylate leads to an increase in the strength of the system. At the same time, the magnitude of the effect is higher for composites containing PRE, and it increases with an increase in the content of the rubber component in the PRE. It is shown that the modification of the PRE polyarylate contributes to an increase in the destruction work of the material by about 2 times and an increase in the glass transition temperature by 15 K. The observed effects are associated with the formation of microheterophase structures due to the release of rubber into particles of an independent phase. In this case, the adhesion between the rubber phase and the polyarylate is carried out using the resin part of the product of the preliminary esterification reaction, which, due to thermodynamic affinity, mixes well with polyheteroarylene, forming an interfacial layer. Heating of the compositions at 453 K, which leads to the chemical interaction of the epoxy resin with the polyarylate, further enhances this adhesion.
Keywords: polyarylate, epoxy resin, butadiene acrylonitrile carboxylate rubber, tensile strength, deformation at break, fracture work, glass transition temperature, electron microscopy.
Pages: 103-111.
For citation: Kochergin, Yu. S.; Zolotareva, V. V. Physico-Mechanical Properties of Epoxy-Rubber Compositions Cured with Cardo Polyarylate. – Text : electronic. – In: Proceeding of the Donbas National Academy of Civil Engineering and Architecture. – 2024. – Issue 2024-1(165) Modern building materials. – Р. 103-111. – URL: https://donnasa.ru/publish_house/journals/vestnik/2024/2024-1(165)/st_16_kochergin_zolotareva.pdf (date of access: 19.11.2024). – ISSN 2519-2817.
Issue 2024-1 (165)
Journal: Proceeding of the Donbas National Academy of Civil Engineering and Architecture
Publish house: Donbas National Academy of Civil Engineering and Architecture
Journal: Proceeding of the Donbas National Academy of Civil Engineering and Architecture
Publish house: Donbas National Academy of Civil Engineering and Architecture