| Preparation of NR Type High Damping Elastomer Taking Advantage Tg Gradient |
| Received:November 07, 2022 Revised:November 07, 2022 |
| DOI：10.12136/j.issn.1000-890X.2023.02.0083 |
| Key Words: NR；ENR；blend；Tg；gradient；damping elastomer |
| Author Name | Affiliation | E-mail | | HUANG Ruili* | South China University of Technology | 36943470@qq.com | | GUO Bingli | Dongguan Goldensun Abrasives Co.，Ltd | | | LU Xun | South China University of Technology | | | FANG Hong | Dongguan Goldensun Abrasives Co.，Ltd | |
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| Abstract: |
| Based on the good compatibility between natural rubber（NR） and epoxidized natural rubber
（ENR），and the gradient difference of glass transition temperature（Tg）of ENR with different epoxidation
degrees，NR and three ENRs（ENR-25，ENR-40 and ENR-50，with a epoxidation degree of 25%，40%,
and 50%，respectively） were selected to prepare a high damping quaternary blends. The damping addition
effect caused by the difference of Tg and the amount of NR and ENRs on the broadening of the damping
temperature range of the compound at room temperature and above was studied. The results showed that，
when the blending ratio of NR/ENR-25/ENR-40/ENR-50 was 55/5/15/25 and 40 phr carbon black N330
was added，the quaternary blend had better overall performance，and its effective damping temperature range
（loss factor greater than 0. 3） was 66 ℃（－15. 3～50. 7 ℃)，the tensile strength reached 17. 2 MPa，and the
elongation at break was 571%. |
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