| Study on Relationship between Cross-linking Density and Crystallization Characteristic of Gutta-Percha Rubber |
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| DOI： |
| Key Words: gutta-percha rubber；cross-linking density；crystallization characteristic |
| Author Name | Affiliation | | LIU Tianqi | Shenyang University of Chemical Technology | | FANG Qinghong | Shenyang University of Chemical Technology | | HU Zhilang | Ankang Heye Biological Engineering Company |
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| Abstract: |
| The effect of cross-linking density of gutta-percha rubber vulcanizate on its physical properties and crystallization characteristics was investigated by differential scanning calorimetry（DSC） method.The results showed that，as the addition level of sulfur increased，the cross-linking density of gutta-percha rubber vulcanizate increased，the Shore A hardness decreased，and the modulus at 100% elongation，tensile strength and elongation at break were increased at first and then decreased.After eliminating thermal history，the crystallization characteristic of gum rubber was weakened.When the cross-linking density increased，the melting peaks were weakened until they disappeared，the crystallization peaks became small and broad，and the area of crystallization peak decreased. |
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