| Influence of Crosslinking Density on Flory-Huggins Interaction Parameter between SBR and Solvent |
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| DOI： |
| Key Words: SBR；crosslinking density；interaction parameter |
| Author Name | Affiliation | | LI Xiaopeng | Qingdao University of Science and Technology；Xi’an Aerospace Power Research Institute | | TAN Shan | Qingdao University of Science and Technology | | XIE Biao | Qingdao University of Science and Technology | | LIU Guangyong | Qingdao University of Science and Technology | | ZHAO Shugao | Qingdao University of Science and Technology | | Martin Hoch | LANXESS Chemical （China） Co.，Ltd |
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| Abstract: |
| The influence of the crosslinking density on the Flory-Huggins parameter between SBR and solvent was studied.The samples with different crosslinking density were prepared by changing the addition level of sulfur.The average molecular weight between crosslinking points was calculated using Tube model.The volume fractions of rubber after swelling in toluene，cyclohexane and ethyl acetate were measured by equilibrium swelling test.Then the interaction parameters between rubber and solvents were obtained using Flory-Rehner equation.The results showed that the interaction parameter had a linear relationship with the volume fraction of rubber after swelling.However，the relationship was different for different solvents.In this study，a modified Flory-Rehner equation was also proposed to calculate the average molecular weight between crosslinking points by the equilibrium swelling method. |
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