| 双硫酯对RAFT自由基交联聚合动力学和交联结构的影响 |
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| 引用本文： | 沈俊,张洪文,朱梦冰,丁永红,俞强.双硫酯对RAFT自由基交联聚合动力学和交联结构的影响[J].高分子材料科学与工程,2010(3):57-60. |
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| 作者姓名： | 沈俊 张洪文 朱梦冰 丁永红 俞强 |
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| 作者单位： | 江苏工业学院材料科学与工程学院; |
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| 基金项目： | 国家自然科学基金资助项目(20674032) |
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| 摘 要： | 使用差示扫描量热(DSC)、萃取/平衡溶胀和动态力学分析(DMA)研究了双硫酯结构对二甲基丙烯酸酯可逆加成-断裂链转移(RAFT)自由基聚合速率、凝胶行为和交联结构的影响。聚合速率取决于双硫酯Z基团的稳定作用,Z基团为苯基时聚合速率最慢,Z基团为环己基时聚合速率最快;二硫代苯甲酸苄酯(BDB)中Z基团的强稳定作用使中间态自由基浓度增大,中间态自由基的双基终止导致凝胶点提前;环己基二硫代甲酸苄酯(BCDC)中Z基团的弱稳定作用使反应控制能力下降,不利于交联网络的均匀性。
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| 关 键 词： | 可逆加成-断裂链转移 双硫酯 聚合动力学 交联结构 |
Effect of Dithioesters on the Kinetics of Reversible Addition-Fraction Chain Transfer Crosslinking Polymerization and the Network Structure |
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| SHEN Jun,ZHANG Hong-wen,ZHU Meng-bin,DING Yong-hong,YU Qiang.Effect of Dithioesters on the Kinetics of Reversible Addition-Fraction Chain Transfer Crosslinking Polymerization and the Network Structure[J].Polymer Materials Science & Engineering,2010(3):57-60. |
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| Authors: | SHEN Jun ZHANG Hong-wen ZHU Meng-bin DING Yong-hong YU Qiang |
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| Affiliation: | School of Materials Science and Engineering;Jiangsu Polytechnic University;Changzhou 213164;China |
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| Abstract: | Three dithioesters with different Z-moieties were used as chain transfer agents in the reversible addition-fraction chain transfer(RAFT)radical polymerization of dimethacrylates in order to investigate the effect of dithioester structure on the kinetics,gelation and network structure.The polymerization rate was monitored with differential scanning calorimetry(DSC),the gelation and the network structure was measured by solvent extraction/swelling and dynamic mechanical analysis(DMA).The polymerization rate i... |
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| Keywords: | reversible addition-fragmentation transfer dithioester polymerization kinetics network structure |
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