| Study on Degradation of NR Vulcanizate by High Energy Ultraviolet Light |
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| DOI： |
| Key Words: ultraviolet light degradation；NR vulcanizate；degradation mechanism；sol |
| Author Name | Affiliation | | DING Linlin | Beijing University of Chemical Technology | | SHI Jinwei | Beijing University of Chemical Technology | | LU Xiyao | Beijing University of Chemical Technology | | ZHANG Liqun | Beijing University of Chemical Technology |
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| Abstract: |
| The degradation process of NR vulcanizate was studied by using high energy ultraviolet light（UV）reaction vessel，and the degradation degree of NR vulcanizate，the molecular structure of sol and the UV degradation mechanism of NR vulcanizate were investigated.The results showed that，NR vulcanizate was degraded quickly under the irradiation of high energy UV，as the exposure time prolonged，sol mass fraction increased，and sol molecular weight decreased. During the UV irradiation process，oxygen was involved in the UV degradation process of NR vulcanizate，the main chain of the NR vulcanizate was broken，the degradation products contained oxygen groups，and the hydrophilic property increased.With further exposure, the oxygen-containing groups in degradation products reacted with other groups under UV irradiation，the content of oxygen groups was reduced，and hydrophilic property decreased. |
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