含非共轭双键RAFT试剂的合成及与乙酸乙烯酯的共聚

发布时间：2018-03-28 02:22

本文选题：可逆加成-断裂链转移聚合　切入点：乙酸乙烯酯　出处：《高分子材料科学与工程》2017年06期

【摘要】：以烯丙基胺、溴丙酰溴及黄原酸钾为原料,制备出含非共轭双键可逆加成-断裂链转移聚合(RAFT)试剂——N-烯丙基-(2-乙基黄原酸基)丙酰胺(NAPA)。研究了加料顺序、反应温度、溶剂等对NAPA产率的影响,获得了较优的合成条件,最终产率可达70%;红外光谱、核磁共振氢谱表明其化学结构与设计结构相符。以NAPA与乙酸乙烯酯(VAc)共聚,制备出具有支化结构的聚乙酸乙烯酯。采用称量法、核磁共振氢谱和凝胶渗透色谱法等手段研究了NAPA与VAc的共聚行为及共聚产物的结构,结果表明,NAPA与VAc共聚过程符合"活性"/可控自由基聚合特征;同时,在引发剂偶氮二异丁腈(AIBN)比例恒定的情况下,支化PVAc聚合物分子链上NAPA含量随着投料比NAPA/VAc的增加而增加。
[Abstract]:Using allylamine, bromoalanyl bromide and potassium xanthate as raw materials, a reversible addition-break chain transfer polymerization (RAFT) reagent containing unconjugated double bonds was prepared. The effect of solvent on the yield of NAPA was obtained, and the final yield was up to 70. The chemical structure of NAPA was consistent with the designed structure by IR and NMR spectra. The copolymerization of NAPA with vinyl acetate was carried out. Poly (vinyl acetate) with branched structure was prepared. The copolymerization behavior of NAPA and VAc and the structure of copolymer products were studied by means of weighing method, nuclear magnetic resonance (NMR) hydrogen spectrum and gel permeation chromatography. The results show that the copolymerization of napa and VAc accords with the characteristics of "active" / controllable free radical polymerization, and at the same time, the content of NAPA on the branched PVAc polymer chain increases with the increase of the ratio of NAPA/VAc under the condition of constant initiator ratio of azodiisobutyronitrile (AIBN).
【作者单位】：高分子材料工程国家重点实验室(四川大学)四川大学高分子研究所;
【基金】：国家自然科学基金资助项目(51403140)
【分类号】：O631.5

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