| 丁腈橡胶硫化反应动力学研究 |
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| 引用本文： | 崔子文,景元蓉,刘广永.丁腈橡胶硫化反应动力学研究[J].特种橡胶制品,2021(1):8-12. |
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| 作者姓名： | 崔子文 景元蓉 刘广永 |
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| 作者单位： | 青岛科技大学高分子科学与工程学院 |
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| 基金项目： | 山东省自然科学基金,基金号ZR2019MEM028;山东省重点研发计划,基金号2019GSF109025。 |
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| 摘 要： | 设计了促进剂A 4种不同用量的丁腈橡胶配方;基于配方,先利用密炼机将丁腈橡胶、硬脂酸和ZnO混炼,再利用开炼机加入硫黄、促进剂和防老剂,再利用无转子硫化仪分别测试了160℃、170℃和180℃下胶料硫化曲线;基于硫化曲线计算出了每组配方胶料硫化反应速率常数K和活化能Ea。结果表明,在焦烧期时,NBR硫化反应为非一级反应,真正的一级反应开始于硫化速率达到最大时,即tdis;焦烧期后的反应可分为2个阶段且遵循一级动力学反应规律。
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| 关 键 词： | 丁腈橡胶 硫化反应动力学 一级反应 反应速率常数 活化能 |
Study on Kinetics of Vulcanization Reaction of NBR |
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| CUI Zi-wen,JING Yuan-rong,LIU Guang-yong.Study on Kinetics of Vulcanization Reaction of NBR[J].Special Purpose Rubber Products,2021(1):8-12. |
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| Authors: | CUI Zi-wen JING Yuan-rong LIU Guang-yong |
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| Affiliation: | (Qingdao University of Science and Technology,Qingdao 266042,China) |
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| Abstract: | Four NBR formulas with different content of accelerator A were designed.According to the formulas,NBR,stearic acid and ZnO were mixed by an internal mixer,and then sulfur,accelerators and anti-aging agents were added by an open mill,vulcanization curves of the compounds at 160℃,170℃and 180℃were finally measured by a non-rotor vulcanizer.According to the vulcanization curve,vulcanization reaction rate constant K and activation energy Ea of each group of formulations were calculated.The results showed that the vulcanization reaction of NBR was a non-first-order reaction during scorch phase,the true first-order reaction started when the vulcanization rate had reached maximum,that was,tdis.The reaction after scorch phase was divided into two stages and the first-order kinetic reaction law was followed. |
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| Keywords: | NBR vulcanization reaction kinetics first order reaction reaction rate constant activation energy |
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