| BF_3,络合的丙烯酸乙酯与丙烯的共聚机理 |
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| 引用本文： | 焦书科,姜健,余鼎声.BF_3,络合的丙烯酸乙酯与丙烯的共聚机理[J].高分子学报,1987,0(3):184-189. |
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| 作者姓名： | 焦书科 姜健 余鼎声 |
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| 作者单位： | 北京化工学院应用化学系 北京
(焦书科，姜健)，北京化工学院应用化学系 北京(余鼎声) |
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| 摘 要： | BF_3络合的丙烯酸乙酯(EA)与丙烯(P)在25℃进行自由基共聚。聚合速率和引发剂浓度的平方根成直线关系。链转移剂CCl_4可显著影响共聚物的η];溶剂的介电常数越小,共聚反应速率越大;两种单体浓度相等时共聚反应速率最大。~1H-NMR和 _13C-NMR表明,当EA·BF_3]/EA·BF_3]+P]>O.5时所得共聚物为富于EA的无规共聚物。实验数据表明,共聚反应按三元络合物与二元络合物的无规共聚机理进行,当EA·BF_3]/EA·BF_3]+P]<0.5时,得到交替共聚物,共聚反应按三元络合物均聚机理进行。UV光谱测得了戊烯-1(丙烯的同系物)与EA·BF_3三元络合物的存在,这对三元络合物的均聚机理是有力的证据。
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| 关 键 词： | 三氟化硼络合丙烯酸乙酯 丙烯 交替共聚 无规共聚 自由基共聚合 三元络合物机理 二元络合物 动力学 |
| 收稿时间： | 1985-01-17 |
THE MECHANISM OF COPOLYMERIZATION OF BF3-COMPLEXED ETHYL ACRYLATE WITH PROPYLENE |
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| JIAO Shu-ke,JIANG Jian,YU Ding-sheng.THE MECHANISM OF COPOLYMERIZATION OF BF3-COMPLEXED ETHYL ACRYLATE WITH PROPYLENE[J].Acta Polymerica Sinica,1987,0(3):184-189. |
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| Authors: | JIAO Shu-ke JIANG Jian YU Ding-sheng |
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| Institution: | Department of Applied Chemistry; Beijing Institute of Chemical Technology; Beijing |
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| Abstract: | The mechanism of the copolymerization of BF3 complexed ethyl acrylate with propylene in the presence of AIBN at 25℃ were investigated. When EA-BF3] /EA-BF3] +P] >0.5, the copolymerization follows the mechanism of the randon copolymerization of the ternary complex with binary complex, obtaining the acrylate-rich random copolymer. When EA-BF3] /EA. BF3] +P]≤0.5, the copolymerization follows the mechanism of ternary complex homopoly-merization, obtaining the alternating copolymer. |
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| Keywords: | BF3 EA Propylene Alternating copolymerization Random copolymerization Radical copolymerization Ternary complex mechanism Binary complex Kinetics |
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