Ph_3P催化丙炔酰胺的加成聚合及其聚合物结构表征
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摘要
本论文研究的主要内容是Ph_3P催化丙炔酰胺的加成聚合,包括聚合过程研究、聚合产物的结构表征、性能测试及聚合机理的初步探讨。
     以红外、~1H-NMR、~(13)C-NMR以及时间飞行质谱(MALDI-TOF)等测试方法对聚合物进行表征。结果表明丙炔酰胺在Ph_3P亲核试剂催化下发生碳碳叁键与氨基的加成聚合反应,从而得到超支化聚丙炔酰胺。研究了聚合反应条件(如溶剂、温度和单体与Ph_3P摩尔比等)对聚合的影响。得到的聚合物的分子量在600-900范围内(聚合度为9-13);极性增大、温度升高,聚合物产率降低;催化剂与单体摩尔比增加,产率增大。
     对聚丙炔酰胺进行了初步性能测试,该聚合物具有荧光特性。
     通过聚合过程分析以及产物表征可以得到,Ph_3P进攻炔键使酰胺氮原子上氢发生质子转移(包括分子间或分子内)。整个过程为亲核加成-质子转移-逐步聚合过程。
The addition polymerization of propiolamide catalyzed by Ph_3P was discussed, including the process of polymerization, the structures and properties of the polypropiolamide and the mechanism of the polymerization.
     The results of FT-IR,~1H-NMR ~(13)C-NMR and MS showed: the reaction of alkynoates and amides in propiolamide in the presence of Ph_3P proceeds and the hyperbranched polypropiolamide is obtained finally. Different reaction conditions such as monomer concentrations, temperatures and solvents were also discussed. The molecular weight of the polypropiolamide was 600-900(the degree of the polymerization was 9-13). The yield of polymer decreased with the temperature's rising, the molar rate's increasing of Ph_3P and monomer and the polarity's heightening of solvents.
     What's more, our primary test showed that the hyperbranched polymer prepared is blessed with fluorescent properties.
     The analysis of the process of the polymerization and the primary characteristic of the polymer indicated that intermolecular and intramolecular proton transfer of the hydrogen on the amido group happened when Ph_3P attacked alkynoates. The whole process of the polymerization included nucleophilic addition, proton transfer and step reaction polymerization.
引文
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