| 天然橡胶环氧化改性工艺研究 |
| Study on Process for Epoxidation Modification of NR |
| 投稿时间：2019-01-22 修订日期：2019-01-22 |
| DOI：10.12136/j.issn.1000-890X.2020.01.0061 |
| 中文关键词: 天然橡胶 天然胶乳 环氧化 乳化剂 中和剂 缓冲剂 温度 催化剂 环氧度 反应效率 |
| 英文关键词: NR natural latex epoxidation emulsifier neutralizer buffering agent temperature catalyst epoxy reaction efficiency |
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| 中文摘要: |
| 研究中性环境制备环氧化天然橡胶（ENR）的工艺。本试验确定的天然橡胶（NR）环氧化改性体系反应条件如下：乳化剂 异构十三碳醇聚氧乙烯醚1308，体系的NR固形物质量分数 0.25～0.28，NR/丙酮/过氧硫酸氢钾的物质的量比 1∶0.435∶0.190，温度 4～8 ℃。在此反应条件下可制得环氧度为28%、反应效率为73.68%的ENR。此方法制得的ENR性能稳定，副产物少。 |
| 英文摘要: |
| 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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