| Effect of LIR on Properties of NR/TPI Blends |
| Received:April 23, 2021 Revised:April 23, 2021 |
| DOI：10.12136/j.issn.1000-890X.2022.09.0659 |
| Key Words: LIR；NR；TPI；vulcanization characteristics；crystallinity；physical property；dynamic mechanical property |
| Author Name | Affiliation | E-mail | | WU Youping* | Beijing University of Chemical Technology | wuyp@mail.buct.edu.cn | | LIU Huanhuan | Beijing University of Chemical Technology | | | PANG Song | Beijing University of Chemical Technology | | | YU Yang | Beijing University of Chemical Technology | |
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| Abstract: |
| The effects of the amount of liquid polyisoprene rubber （LIR-50 ） on the vulcanization
characteristics，crystallinity，physical properties and dynamic mechanical properties of the unfilled and filled
NR/TPI（85/15 of blend ratio） blends were studied. The results showed that，the t10 and t90 of the NR/TPI
blends were extended with the increase of the amount of LIR-50，and the processing fluidity became better.
The crystallization of TPI in the NR/TPI blend was inhibited，and the amount of LIR-50 had little effect on
the crystallinity of the NR/TPI blends. With the increase of the amount of LIR-50，the Shore A hardness，
tensile stress at 300% elongation，tensile strength and storage modulus of the NR/TPI blends decreased. The
NR/TPI blends with 3 phr LIR-50 had the largest tear strength and better comprehensive physical properties.
The addition of LIR-50 had little effect on the wear resistance，wet skid resistance and rolling resistance of
the NR/TPI blends. |
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