| Study on Reclaimed IIR Prepared by Supercritical Carbon Dioxide |
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| DOI： |
| Key Words: RIIR；supercritical carbon dioxide；physical property；thermal stability；gas barrier property |
| Author Name | Affiliation | | SHI Jin-wei | Beijing University of Chemical Technology | | JIANG Kuan | Beijing University of Chemical Technology | | REN Dong-yun | Beijing University of Chemical Technology | | DING Lin-lin | Beijing University of Chemical Technology | | LU Xi-yao | Beijing University of Chemical Technology | | ZHANG Li-qun | Beijing University of Chemical Technology |
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| Abstract: |
| Reclaimed IIR (RIIR) was prepared from sulfur-cured IIR by using supercritical carbon dioxide.The reclaimed IIR (RIIR)/IIR blends was revulcanized by adopting sulfur and resin vulcanization system respectively，and their properties were investigated.The results showed that， when the temperature was 180 ℃，pressure was 14.1 MPa，devulcanization time was 120 min，and mass fraction of diphenyl disulfide in IIR vulcanizate was 8%，the mass fraction of sol component in RIIR could reach 0.985.With the increase of RIIR content，the torque of RIIR/IIR blends vulcanized by sulfur and resin vulcanization system decreased，and the scorch time and vulcanization time extended.The pure RIIR could not be vulcanized by sulfur，but could be vulcanizated by resin vulcanization system.The gas barrier property and thermal stability of the blends were not affected by the addition level of RIIR.The physical properties of vulcanization system blends vulcanized by resin were better than those vulcanized by sulfur. |
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