| Study on Properties of NR/EUG Blend |
| Received:May 16, 2022 Revised:May 16, 2022 |
| DOI：10.12136/j.issn.1000-890X.2022.12.0899 |
| Key Words: NR；EUG；blend；silica reinforcement；tensile property；crack growth rate；cutting resistance； compression heat build-up |
| Author Name | Affiliation | E-mail | | XIANG Wankun | Beijing University of Chemical Technology | 2301679195@qq.com | | SUN Chongzhi | Beijing University of Chemical Technology | | | SUN Quan | Beijing University of Chemical Technology | | | DENG Linhui | Beijing University of Chemical Technology | | | CHEN Zhi | Beijing University of Chemical Technology | | | LIU Li | Beijing University of Chemical Technology | | | ZHAO Xiuying* | Beijing University of Chemical Technology | zhaoxy@mail.buct.edu.cn |
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| Abstract: |
| In this study，the blends of natural rubber（NR） and eucommia ulmoides （EUG） were
prepared，and effects of NR/EUG blend ratios on the properties of NR/EUG blend（without filler） and silica
reinforced NR/EUG blend were studied. The results showed that，the proportion and size of EUG island
structure of the NR/EUG blend increased with the increase of EUG amount，and the “ridge” lines on the
surface of the NR/EUG blend became more distinct. The tensile strength of the NR/EUG blend with NR/
EUG blend ratio of 80/20 was the largest，which was 28. 8 MPa，and the crack growth rate was the smallest，
which was 23. 5 nm·c-1. The NR/EUG blend with 70/30 NR/EUG blend ratio had the best tensile fatigue
resistance，reaching 2 million fatigue cycles before failure. Moreover，with the increase of EUG amount，the
Shore A hardness，tear strength and storage modulus of the silica reinforced NR/EUG blend increased，and
the tensile set decreased. The silica reinforced NR/EUG blend with NR/EUG blend ratio of 85/15 had small
cutting amount，the lowest compression temperature rise and the lowest Akron abrasion. |
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