A Novel De-Cross-Linking System from Cross-Linked Polymer to Linear Polymer Utilizing Pressure or Visible Light Irradiation
A Novel De-Cross-Linking System from Cross-Linked Polymer to Linear Polymer Utilizing Pressure or Visible Light Irradiation
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DOI：
10.1021/ma801298e
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发表时间：
2008-12-09
期刊：
影响因子：
5.5
通讯作者：
Sakaguchi, Masato
中科院分区：
文献类型：
--
作者：
Iwamura, Takeru;Sakaguchi, Masato
通过安息香和3-乙烯基苯甲醛与乙酸铵和1-丁基咪唑鎓四氟硼酸盐的反应以中等产率制备具有2,4,5-三苯基咪唑部分的单体。使用AIBN(5mol％)作为引发剂，将所得单体与MMA在60℃下进行自由基共聚24小时，以良好的收率得到共聚物。所得共聚物的交联反应用K(3)[Fe(CN)(6)]和KOH进行。通过可见光或压力对所得交联聚合物进行去交联。通过ESR光谱检测咪唑基自由基的信号。该信号表明生成了线性聚合物。
A monomer having a 2,4,5-triphenylimidazole moiety was prepared by the reaction of benzoin and 3-vinylbenzaldehyde with ammonium acetate and 1-butylimidazolium tetrafluoroborate in moderate yield. The radical copolymerization of the obtained monomer and MMA were carried out at 60 degrees C for 24 h by using AIBN (5 mol %) as an initiator to give a copolymer in good yield. The cross-linking reaction of the obtained copolymer proceeded with K(3)[Fe(CN)(6)] and KOH. The obtained cross-linked polymer was de-cross-linked by visible light or pressure. The signal of imidazolyl radical was detected by ESR spectroscopy. This signal showed that a linear polymer was generated.