| Study on Process for Epoxidation Modification of NR |
| Received:January 22, 2019 Revised:January 22, 2019 |
| DOI：10.12136/j.issn.1000-890X.2020.01.0061 |
| Key Words: NR；natural latex；epoxidation；emulsifier；neutralizer；buffering agent；temperature；catalyst； epoxy；reaction efficiency |
| Author Name | Affiliation | E-mail | | lIU Jianye | Hebei University of Science and Technology | 273962205@qq.com | | DU Xiaowei | Hebei University of Science and Technology | | | WANG Pengyuan | Hebei University of Science and Technology | | | NIU Chunmei* | Hebei University of Science and Technology | sjzncm@163.com |
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| Abstract: |
| The process of preparing epoxidized natural rubber（ENR） in a neutral environment was studied. The reaction conditions of the natural rubber（NR） epoxidation modification system were determined as follows：emulsifier isomeric tridecyl alcohol polyoxyethylene ether1308，NR solid content 0. 25～0. 28， molar ratio of NR/acetone/potassium hydrogen sulfate complex salt 1 ∶ 0. 435 ∶ 0. 190，and reaction temperature 4 ～ 8 ℃ . Under those reaction conditions，the ENR with epoxidation of 28% and a reaction efficiency of 73. 68% were obtained. The ENR produced by this method had stable performance and few byproducts. |
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