Journal
JOURNAL OF APPLIED POLYMER SCIENCE
Volume 139, Issue 12, Pages -Publisher
WILEY
DOI: 10.1002/app.51840
Keywords
mechanical properties; structure-property relationships; theory and modeling
Categories
Funding
- Shandong Provincial Natural Science Foundation [ZR2020QE079]
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The study found that the solubility of antioxidants is higher than that of SBR, and the increment increases with temperature. Chi(N) calculated by HSP values can predict the compatibility between SBR and antioxidants to aid in designing green tire tread formulas.
The software package was employed to calculate the three-dimensional solubility parameters (HSP) of SBR and antioxidants. The HSP values of antioxidants are higher than SBR, meaning that the antioxidants have higher polarity compared with SBR. The solubility measurements of antioxidants in both sulfur and peroxide cured SBR vulcanizates were performed at elevated temperatures from 80 to 130 degrees C. The maximum solubilities ( increment S) of antioxidants were correlated with the temperature and also with the new Flory-Huggins interaction parameters (chi(N)) calculated by the HSP values. The results turn out to be that increment S increases with increasing temperature as expected and 4020 shows higher increment S value. Furthermore, increment S increases with decreasing chi(N), and by quantitatively mathematical fitting, one functional relationship between increment S and chi(N) was achieved, regardless of what the crosslinking type of SBR was and what the temperature was involved. Through prediction with chi(N), one can get that SBR grades with higher styrene content and butadiene/vinyl ratio result in lower chi(N) and accordingly better compatibility with N3100. One of the possible applications of chi(N) is to select suitable SBR and antioxidant structures to design the ever-increasing SBR-based green tire tread formula.
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