| 芳氧基钇在DMF中引发丙烯腈聚合的动力学研究 |
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| 引用本文： | 郑豪,张一烽,沈之荃.芳氧基钇在DMF中引发丙烯腈聚合的动力学研究[J].高分子学报,2006(3):429-431. |
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| 作者姓名： | 郑豪 张一烽 沈之荃 |
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| 作者单位： | 1. 浙江大学,化学系,杭州,310027
2. 浙江大学高分子科学研究所,杭州,310027 |
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| 基金项目： | 国家高技术研究发展计划(863计划);浙江省科技厅资助项目 |
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| 摘 要： | 用单组分三(2,6-二叔丁基4甲基苯氧基)钇配合物Y(OAr)3]引发丙烯腈聚合,发现介质对聚合反应的影响很大,在介电常数较大的极性溶剂N,N-二甲基甲酰胺(DMF)中,AN聚合反应的活性较高,在50℃下聚合3h,丙烯腈聚合反应转化率达到94%,所得聚丙烯腈(PAN)含52%间规结构.在DMF中聚合反应速率与单体、引发剂的浓度分别呈一级关系,丙烯腈聚合反应的表观活化能为22.1kJ·mol-1.
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| 关 键 词： | 丙烯腈 芳氧基钇 聚合反应动力学 |
| 收稿时间： | 2004-12-14 |
| 修稿时间： | 2005-01-27 |
KINETICS OF ACRYLONITRILE POLYMERIZATION INITIATED BY Y(OAr)3 in DMF |
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| ZHENG Hao,ZHANG Yifeng,SHEN Zhiquan.KINETICS OF ACRYLONITRILE POLYMERIZATION INITIATED BY Y(OAr)3 in DMF[J].Acta Polymerica Sinica,2006(3):429-431. |
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| Authors: | ZHENG Hao ZHANG Yifeng SHEN Zhiquan |
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| Abstract: | It was found that yttrium tris(2,6-di-tert-butyl-4-methyl phenolate) could be an effective initiator for polymerization of acrylonitrile.The study of influence of solvent showed that DMF with high dielectric constant gave higher conversions(>94%) at 50℃,3 h.The kinetics of acrylonitrile polymerization using Y(OAr)_3 in DMF was investigated by the weight method.The results indicated that the rate of polymerization showed a first order relationship with respect to both the monomer(AN) concentration and the initiator Y(OAr)_3] concentration,respectively,and the overall activation energy of polymerization reaction was 22.1 kJ5mol -1 according to the Arrhenius equation. 13C-NMR studies showed that the PAN prepared had a syndiotactic triad (rr) content of 52%. |
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| Keywords: | Acrylonitrile Y(OAr)_3 Polymerization kinetics |
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