Abstract
A rubber composite was prepared by using methyltriethoxysilane (MTES) to modify silica (SiO2) and epoxidized eucommia ulmoides gum (EEUG) as rubber additives to endow silica with excellent dispersion and interfacial compatibility under the action of processing shear. The results showed that compared with the unmodified silica-reinforced rubber composite (SiO2/EUG/SBR), the bound rubber content of MTES-SiO2/EEUG/EUG/SBR was increased by 184%, and its tensile strength, modulus at 100% strain, modulus at 300% strain, and tear strength increased by 42.1%, 88.5%, 130.8%, and 39.9%, respectively. The Akron abrasion volume of the MTES-SiO2/EEUG/EUG/SBR composite decreased by 50.9%, and the wet friction coefficient increased by 43.2%. The wear resistance and wet skid resistance of the rubber composite were significantly improved.
Highlights
Silica is an important reinforcing material in industrial production [1]
In the infrared spectrum of MTES, the peak at 780 cm−1 assigns to the bending vibration of Si–C, the peaks at 957 cm−1, 1412 cm−1, and 2978 cm−1 corresponded to the characteristic peak of Si–O–CH2, the absorption peak of C–H in methyl group, and the stretching vibration peak of –CH3 [39,40]
In the infrared spectrum of epoxidized eucommia ulmoides gum (EEUG), the peaks at 2963 cm−1, 2925 cm−1, and 2855 cm−1 corresponded to the asymmetric stretching vibration of methyl groups, asymmetric stretching vibration, and symmetric stretching vibration of methylene groups, respectively
Summary
Silica is an important reinforcing material in industrial production [1]. In the 1940s, the production of silica was industrialized. The silane coupling agent can react with silanol on the surface of silica to form covalent bonds, reduce the silanol density of the silica surface, and improve the compatibility of silica with the rubber matrix, leading to the improvement in filler dispersion and the performance of the rubber composite [30]. Bertora [31] used the small molecule coupling agent mercaptosilane (KH590) to graft liquid polybutadiene on the surface of silica and add it to the SBR, where the surface hydrophobicity of the rubber increased, the degree of filler aggregation decreased, and the dispersibility was improved. The dispersion of modified silica was better, the wear resistance of the compound was reaimcpterodvewd,iatnhdtthheewseialravnoolul mgerodeucpresasoednfrtohme0s.1u92rfcamc3etoo0f.1S79iOcm2 3t.o form a covalent b reduceIndthtihs ewosruk,rwfaecfiersat cmtoivdiifityedothfeSsilOica wanithdarsemdaull cmeodleciutsleacogugplloinmg aegreanttimonethtyeln- dency grtoriuetphooxnysitlhaneeE(METUEGS),manadcardodmedoiltetocuthleercuabbnerfomramtrixhtyogdertohegrewnitbhoEnEUdGs otorpurenpdareergo a r the composite material.
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