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研究了通过镍催化转移缩聚的方法来合成全氟环丁基芳基醚聚合物.首先,我们以对溴苯酚和1,2-二溴四氟乙烷为起始原料,通过两步反应得到对溴三氟乙烯基芳基醚,进一步加热环化二聚得到单体1,2-二(4-溴苯氧基)六氟环丁烷.该二聚物再与异丙基格氏试剂发生镁交换反应,生成格氏试剂中间体,在催化剂Ni(dppe)Cl2的存在下发生镍催化转移缩聚生成聚合物.研究了反应时间、温度和单体投料比对催化缩聚反应的影响.
We studied the synthesis of perfluorocyclobutyl aryl ether polymer by nickel catalyzed transfer polycondensation method.Firstly, we used p-bromophenol and 1,2-dibromotetrafluoroethane as starting materials, Trifluorovinyl aryl ether, and further heated to cyclodimerization to obtain the monomer 1,2-bis (4-bromophenoxy) hexafluorocyclobutane, which is then reacted with an isopropyl Grignard reagent to produce magnesium Exchange reaction to generate Grignard reagent intermediates, and nickel catalyzed transfer polycondensation to produce polymers in the presence of Ni (dppe) Cl2 catalyst.The effects of reaction time, temperature and monomer feed ratio on the catalytic polycondensation reaction were studied.