| Study on UV Aging Mechanism of Polyisoprene |
| Received:July 23, 2022 Revised:July 23, 2022 |
| DOI：10.12136/j.issn.1000-890X.2024.06.0411 |
| Key Words: polyisoprene；UV light；aging mechanism |
| Author Name | Affiliation | E-mail | | liujinrui | HaiNan Normal University | jinruiliu1996@163.com | | li bangsen | HaiNan Normal University | | | lin xiaoxue | HaiNan Normal University | | | zhang yan | HaiNan Normal University | | | zhang dashuai | HaiNan Normal University | | | li chen | HaiNan Normal University | | | shi jianjun | HaiNan Normal University | | | sun tianyi | HaiNan Normal University | | | shizaifeng* | HaiNan Normal University | | | lin qiang | HaiNan Normal University | |
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| Abstract: |
| The UV aging mechanism of cis-1，4-polyisoprene（hereinafter referred to as polyisoprene）was analyzed by Fourier transform infrared spectroscopy，gel permeation chromatography，differential scanning calorimetry，nuclear magnetic resonance spectroscopy and UV-Vis absorption spectroscopy.The results showed that，the UV aging resistance of polyisoprene was poor，and ripples appeared on its surface after UV irradiation.During the UV irradiation process，the polyisoprene mainly underwent branched chain substitution and hydrogen and free radical transfer reactions，and the glass transition temperature increased. |
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