| Solubility and Diffusion of Sulfur in NR Vulcanizate |
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| DOI： |
| Key Words: sulfur；NR vulcanizate；solubility；distribution coefficient；diffusion coefficient |
| Author Name | Affiliation | | Zeng Jijun | Polymer Research Institute，Sichuan Union University | | Huang Jiazhan | Polymer Research Institute，Sichuan Union University |
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| Abstract: |
| It was determined based on the distribution law that the solubility of sulfur in NR vulcanizate was 1.04 g·(100 g)-1 at 40 ℃ and the distribution coefficient of sulfur between NR compound and its vulcanizate，K was 0.84.Therefrom，it was predicted by calculation that the solubility of sulfur in NR compound at 40 ℃ was 1.24.Thus，a theoretical diffusion curve of sulfur from NR compound to its vulcanizate at 40 ℃ during the storage period was derived based on the fact that the average diffusion coefficient of sulfur in vulcanizate，D was 3.2×10-5 mm2·s-1 when the calculation was carried out from the experimental diffusion curve of sulfur. |
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