| 不同金属盐破乳对丁基橡胶硫化行为的影响 |
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| 引用本文： | 饶纤纤,杜淼,单国荣,潘鹏举. 不同金属盐破乳对丁基橡胶硫化行为的影响[J]. 化工学报, 2023, 74(2): 756-765. DOI: 10.11949/0438-1157.20220998 |
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| 作者姓名： | 饶纤纤 杜淼 单国荣 潘鹏举 |
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| 作者单位： | 1.化学工程联合国家重点实验室，浙江大学化学工程与生物工程学院，浙江 杭州 310027;2.浙江大学衢州研究院，浙江 衢州 324000;3.浙江大学高分子科学与工程学系，浙江 杭州 310027 |
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| 基金项目： | 国家自然科学基金面上项目(51873180) |
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| 摘 要： | 为考察金属盐凝固剂对丁基橡胶(isobutylene isoprene rubber,IIR)硫化行为的影响，采用流变仪研究了搅拌破乳及11种金属盐破乳后IIR的硫化历程，并分析了其硫化动力学。研究发现金属盐的阳离子及阴离子种类对硫化过程均有显著影响。与传统Ca2+凝固剂相比，过渡金属离子Cu2+、Zn2+破乳会延长焦烧期及正硫化时间，降低硫化表观活化能，硫化膜储能模量较高。与搅拌破乳相比，主族金属离子Ca2、Mg2+、Al3+破乳对硫化过程影响较小。阴离子Cl-及NO3-有显著的硫化抑制作用，降低硫化表观速率常数，延长正硫化时间；阴离子SO42-和OAc-对IIR的硫化历程影响较小，相应的IIR硫化胶具有更高的模量。
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| 关 键 词： | 动力学 流变学 聚合物加工 多价金属盐 IIR胶乳 凝固剂 |
| 收稿时间： | 2022-07-15 |
Effect of different metal salt demulsifiers on vulcanization behavior of isobutylene isoprene rubber |
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| Xianxian RAO,Miao DU,Guorong SHAN,Pengju PAN. Effect of different metal salt demulsifiers on vulcanization behavior of isobutylene isoprene rubber[J]. Journal of Chemical Industry and Engineering(China), 2023, 74(2): 756-765. DOI: 10.11949/0438-1157.20220998 |
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| Authors: | Xianxian RAO Miao DU Guorong SHAN Pengju PAN |
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| Affiliation: | 1.State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, Zhejiang, China;2.Institute of Zhejiang University-Quzhou, Quzhou 324000, Zhejiang, China;3.Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, Zhejiang, China |
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| Abstract: | In order to explore the effect of metal salt demulsifiers on the vulcanization behavior of isobutylene isoprene rubber (IIR), the vulcanization process of IIR demulsified by stirring and 11 metal salts was measured by a rheometer, and the vulcanization kinetics was analyzed. It was found that the cation and anion species of metal salts had significant effects on the vulcanization process. Compared with traditional Ca2+ coagulants, the demulsification of transition metal ions Cu2+ and Zn2+ can prolong the scorch period and positive vulcanization time, reduce the apparent activation energy of vulcanization, and the storage modulus of the vulcanized film is higher. The demulsification by using the main group metal ions Ca2+, Mg2+, Al3+ has little effect on the vulcanization process of IIR. Chloride ion and nitrate ion have significant vulcanization inhibition, reducing the apparent rate constant of vulcanization, and prolonging the positive vulcanization time. Sulfate ion and acetate ion have little effect on the vulcanization process of IIR, and the corresponding IIR vulcanizates have higher modulus. |
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| Keywords: | kinetics rheology polymer processing multivalent metal salt IIR emulsion demulsifier |
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