| Effect of Fillers on Crystallinity of Gutta-percha Rubber |
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| DOI： |
| Key Words: gutta-percha rubber；bound rubber；crystallinity；filler |
| Author Name | Affiliation | | Wang Xuelin | Polymer Physics Laboratory，Institute of Chemistry，Chinese Academy of Sciences | | Zhao Zhigang | Polymer Physics Laboratory，Institute of Chemistry，Chinese Academy of Sciences | | Xue Zhaohong | Polymer Physics Laboratory，Institute of Chemistry，Chinese Academy of Sciences | | Yan Ruifang | Polymer Physics Laboratory，Institute of Chemistry，Chinese Academy of Sciences |
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| Abstract: |
| The gutta-percha rubber filled with various fillers and the bound rubber on the filler surface were investigated by differential scanning calorimetry(DSC) and infra-red spectrum(IR).Based on the results of DSC，we found not only the distinct effect of filler variety on the crystallization of gutta-perchar rubber matrix，but also obviously different DSC results between bound rubber and rubber matrix.Due to the effect of fillers，the filled gutta-percha rubber matrixs crystallization temperature and enthalpy shifted obviously downwards in DSC curves，but DSC curves still behaved as a typical characteristics of crystallization and fusion.On the contrary，in bound rubbers DSC curves，we observed the non-typical，broad distributive endothermal peak. |
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