| Effects of powdered fillers on elongation at break of rubber composites |
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| DOI： |
| Key Words: powdered filler；SBR；EPDM；NBR；silicone rubber；elongation at break |
| Author Name | Affiliation | | ZHANG Qi | Beijing University of Chemical Technology | | WU You-ping | Beijing University of Chemical Technology | | LIU Li | Beijing University of Chemical Technology | | TIAN Ming | Beijing University of Chemical Technology | | ZHANG Li-qun | Beijing University of Chemical Technology |
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| Abstract: |
| The effects of the powdered fillers on the elongation at break of the rubber composites were investigated using SBR，EPDM，NBR and silicone rubber compounds filled with different levels of magnesium hydroxide，which had different particle sizes，light calcium carbonate and black N110 respectively.The results showed that there was a competitive relationship among the effects of the surface activity，particle size，dispersity and addition level of powdered fillers，as well as the tensile strength and elongation at break of rubber matrix on the elongation at break of rubber composites.The increase of the elongation at break of rubber composites with the addition level of powdered fillers was influenced by the particle size of powdered fillers and the cross-linking density of rubber matrix.If the powdered fillers gave the rubber matrix the stronger reinforcing effect，the addition level of powdered fillers with which the peak elongation at break of rubber composites occured was lower.In contrast with the traditional viewpoint，it was concluded from the test that the powdered fillers were beneficial to increase the elongation at break of rubber composites. |
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