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合成了一系列2-氨基吡啶镍配合物(2-PyCH2NAr)NiBr,Ar=2,6-二甲基苯基(a),2,6-二异丙基苯基(b),2,6-二氟苯基(c).在助催剂甲基铝氧烷(MAO)存在下,该系列配合物能高活性催化β-蒎烯聚合,得到的聚β-蒎烯分子量明显比传统正离子聚合所得到的聚合物高.对配合物配体结构以及聚合条件对该聚合的催化活性以及聚合物分子量的影响进行了研究.所得聚合物经1H-NMR和13C-NMR分析表明,β-蒎烯聚合是通过正离子方式进行的,聚合中产生开环异构化,得到由环己烯和异丁烷结构单元交替组成的聚β-蒎烯.
A series of 2-aminopyridine nickel complexes (2-PyCH2NAr) NiBr, Ar = 2,6-dimethylphenyl (a), 2,6-diisopropylphenyl -difluorophenyl (c) .In the presence of promoter MAA, the series of complexes can catalyze the polymerization of β-pinene with high activity, and the molecular weight of the obtained poly-β-pinene is obviously higher than that of the traditional positive The effects of the ligands and the polymerization conditions on the catalytic activity and the molecular weight of the polymers were studied.The results of 1H-NMR and 13C-NMR analysis showed that the β- Polymerization of pinene is carried out by the positive ion method, and ring-opening isomerisation occurs during the polymerization to obtain poly-β-pinene which is composed of alternating cyclohexene and isobutane structural units.