| Change in Rubber Cross-linking Network Structure during Tensile Deformation |
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| DOI： |
| Key Words: ESBR；tensile；crosslink density；type of cross-linking bond |
| Author Name | Affiliation | | SHEN Shuang-shuang | Beijing University of Chemical Technology | | WANG Yi-qing | Beijing University of Chemical Technology | | ZHU Jing | Beijing University of Chemical Technology | | ZHANG Li-qun | Beijing University of Chemical Technology |
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| Abstract: |
| The change of cross-linking network structure of ESBR vulcanizate during tensile deformation was studied.The results showed that，the crosslink density and type of cross-linking bond were influenced by the addition level of sulfur.The measured incremental modulus of vulcanizate under small deformation was in agreement with the calculated value from crosslink density using statistical mechanics.The total crosslink density of vulcanizate decreased during tensile deformation.The total crosslink density at breaking point was similar with that near the transition point（inflexion point of stress-strain curve），but the number of single and double bonds increased，and the increase was linearly depended on the original amount of polysulfide bond，which indicated some broken polysulfide bond restructured to form single and double bond. |
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