تهيه و بررسي خواص مكانيكي و حرارتي چسب‌هاي پايه اپوكسي اصلاح‌شده به وسيله‌ي متيل متاكريلات-بوتادين استايرن (MBS) و نانوذره اكسيد زيركونيم (ZrO2)

Preparation and eva‎luation of mechanical and thermal properties of epoxy adhesives modified with methyl methacrylate-butadiene styrene (MBS) and zirconium oxide nanoparticle (ZrO2)

مهندسي شيمي

In recent years, the adhesive industry had significant changes that they have become a perfect substitute for mechanical connectors. Adhesives are usualy in the form of paste, film and powder, among which epoxy based adhesives are the most widely used adhesives in the industry. In order to achieve ideal mechanical and thermal properties in epoxy adhesives, to investigate the effect of pure zirconium oxide nanoparticles and zirconium oxide nanoparticles modified by APTES in the combination of phr 1,3,5 percentages as cure of mechanical properties and methyl methacrylate core-shell particles. Butadiene styrene in the combination of 1, 3, 5 phr percentages is used as a hardening agent. In this research, after the surface modification of ZrO2 nanoparticles by APTES, nanoparticles and core-shell particles were added separately and in combination to epoxy resin, and the best results are related to the combination of phr3 percentage. In order to obtain the results, firstly, the Fourier transform infrared spectroscopy (FTIR) test was used to ensure the success of the chemical bonds formed by APTES on the ZrO2 nanoparticle surface and to identify the functional groups on the ZrO2 nanoparticle surface, and then the (tensile test) was used To examine the mechanical properties of adhesives, the field-emission scanning electron microscopy (FE-SEM) test is used to check the fracture surface morphology and distribution of ZrO2 nanoparticles and MBS particles in the epoxy matrix, and the thermogravimetric analysis (TGA) is used to analyse the heat resistance of the prepared product. In the examination of the results of the tests, it was shown that the mechanical properties and adhesion, in the composite sample containing 3phr ZrO2 nanoparticles modified with APTES along with MBS binder, due to excellent synergy, a significant increase in shear strength, tensile strength, modulus Youngʹs and toughness shows that it is 80%, 146%, 52% and 550% compared to pure epoxy. And 11%, 14%, 4% and 11%, 14%, 4%, respectively, compared to the composite sample containing unmodified nanoparticles along with core-shell particles has increased by 150%. SEM images showed that ZrO2 nanoparticles and MBS particles are uniformly distributed in the epoxy matrix and there is good adhesion between nanoparticles, matrix and binder, which leads to effective stress distribution and increase adhesive resistance against cracking. The results show that the composite sample containing 3phr nanoparticles modified by APTES and phr3 MBS core-shell particles can act as effective reinforcements to significantly improve the mechanical and thermal properties of epoxy adhesive and also have wide applications in various fields.

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