ESBR Nanocomposites Filled with Monodisperse Silica Modified with Si747: The Effects of Amount and pH on Performance

To prepare silica/rubber composites for low roll resistance tires, a novel strategy was proposed in this study, in which autonomous monodisperse silica (AS) was prepared and modified using 3-mercaptopropyloxy-methoxyl-bis(nonane-pentaethoxy) siloxane (Si747), after which silica/emulsion styrene buta...

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Published inPolymers Vol. 15; no. 4; p. 981
Main Authors Xia, Lijian, Tao, Anmin, Cui, Jinyun, Sun, Abin, Kan, Ze, Liu, Shaofeng
Format Journal Article
LanguageEnglish
Published Switzerland MDPI AG 16.02.2023
MDPI
Subjects
Alcohol
Analysis
Butadiene
Carbon black
ESBR/silica nanocomposites
Fourier transforms
Infrared analysis
Latex
latex compounding technique
monodisperse silica
Nanocomposites
R&D
Research & development
Rolling resistance
Rubber
Si747
Silica
Silicon dioxide
Siloxanes
Skid resistance
Sulfur
Thermal analysis
Thermogravimetric analysis
VOCs
Volatile organic compounds
China
monodisperse silica
ESBR/silica nanocomposites
Si747
latex compounding technique
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Summary:To prepare silica/rubber composites for low roll resistance tires, a novel strategy was proposed in this study, in which autonomous monodisperse silica (AS) was prepared and modified using 3-mercaptopropyloxy-methoxyl-bis(nonane-pentaethoxy) siloxane (Si747), after which silica/emulsion styrene butadiene rubber (ESBR) master batches were produced using the latex compounding technique. Meanwhile, the commercial precipitated silica (PS) was introduced as a control. In this study, the effects of amount of Si747 and pH value on the properties of the silica/ESBR composites were systematically analyzed. Thermal gravimetric analysis (TGA) and Fourier transform infrared (FTIR) results indicated that Si747 reduced the silanol group by chemical grafting and physical shielding, and the optimum amounts of Si747 for AS and PS modification were confirmed to be 15% and 20%, respectively. Under a pH of 9, ESBR/modified AS (MAS) composites with 15% Si747 presented better silica dispersion and a weaker Payne effect, compared with ESBR/modified PS (MPS) composites with 20% Si747. Meanwhile, in terms of dynamic properties, the ESBR/MAS composites exhibited a better balance of lower rolling resistance and higher wet skid resistance than the ESBR/MPS composites.
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ISSN:2073-4360
2073-4360
DOI:10.3390/polym15040981