| Study on Structures and Damping Properties of Hindered Phenol AO-60/NR Composites |
| Received:February 27, 2023 Revised:February 27, 2023 |
| DOI：10.12136/j.issn.1000-890X.2025.01.0018 |
| Key Words: natural rubber; damping; AO-60; loss factor; phase structure |
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| Abstract: |
| The effect of hindered phenolic AO-60 amounts on the structures and damping properties of hindered phenol AO-60/natural rubber（NR） composites were studied.The results showed that，when hindered phenol AO-60 amount was no more than 50 phr，hindered phenol AO-60 formed small aggregates in the composites.As hindered phenol AO-60 amount increased，more and more large aggregates of hindered phenel AO-60 formed.In different scanning calorimetry analysis，hindered phenol AO-60 underwent amorphous and crystalline transitions at 48 and 107 ℃，respectively.At room temperature，the tanδ of the composites with no more than 50 phr hindered phenol AO-60 reached 0.2 or more，while the tanδ of NRcompound without hindered phenol AO-60 was 0.05.As hindered phenol AO-60 amount increased，the Fmax FLof the composites decreasede，the t10 and t90 were significantly prolonged，the tensile strength and tear strength decreased，and the rebound value was the smallest of the composite with 50 phr hindered phenol AO-60 amount.Overall，when hindered phenolic AO-60 amount was 50 phr，the hindered phenol AO-60/NR composite had the best properties. |
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