| Cu~(2+)-Na_2SO_3体系引发甲基丙烯酸甲酯聚合动力学 |
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| 引用本文： | 杨义光,吴锦远,杨超雄.Cu~(2+)-Na_2SO_3体系引发甲基丙烯酸甲酯聚合动力学[J].高分子学报,1991,0(5):547-553. |
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| 作者姓名： | 杨义光 吴锦远 杨超雄 |
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| 作者单位： | 中国科学院广州化学研究所，中国科学院广州化学研究所，中国科学院广州化学研究所 广州 510650，广州 510650，广州 510650 |
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| 摘 要： | 研究了Gu~(2+)-Na_2SO_3氧化还原体系在静置的密闭空气气氛下引发甲基丙烯酸甲酯水溶液聚合。表观聚合速度(R_p)是 R_p=1.86×10~(15)e~(-24,200/RT)MMA]~(1·0)Cu~(2+)]~0Na_2SO_]~(0·50)覆盖气氛对聚合有显著影响。氧抑制聚合反应,但可使Gu~(2+)离子氧化再生。表现为低的表观聚合速度和高的碰撞频率因子与表现聚合活化能。 本文讨论了引发聚合机理。
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| 关 键 词： | 甲基丙烯酸甲酯 沉淀聚合 氧化还原反应 催化剂 |
| 收稿时间： | 1990-04-18 |
POLYMERIZATION OF METHYL METHACRYLATE IN AQUEOUS MEDIUM WITH COPPER CHLORIDE-SODIUM SULFITE REDOX SYSTEM |
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| YANG Yi-guang,WU Jin-yuan,YANG Chao-xiong.POLYMERIZATION OF METHYL METHACRYLATE IN AQUEOUS MEDIUM WITH COPPER CHLORIDE-SODIUM SULFITE REDOX SYSTEM[J].Acta Polymerica Sinica,1991,0(5):547-553. |
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| Authors: | YANG Yi-guang WU Jin-yuan YANG Chao-xiong |
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| Institution: | Guangzhou Institute of Chemistry; Academia Sinica; Guangzhou; Post code: 510650 |
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| Abstract: | Aqueous polymerization of methyl methacrylate initiated by copper chloride-sodium sulfite redox pair was investigated under the close air atmosphere and without shaking. The overall rate of polymerization (RP) isThe covering atmosphere affects the polymerization process markedly. Oxygen retards the polymerization, but it is able to oxidize Cu+ to Cu2+.As a result, it shows the lower overall rate of polymerization, higher collision frequency factor and overall activation energy of polymerization. Mechanism of initiation was proposed and discussed. |
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| Keywords: | Methyl methacrylate Polymerization Redox Catalyst |
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