Abstract In this study, three middle range α-olefin monomers including 1-hexene, 1-octene, and 1-decene were oligomerized using conventional AlCl3/H2O catalytic system. Molecular weight and microstructure of the oligomers were analyzed by GPC and 1HNMR, respectively. By 1HNMR spectra, both internal (CHR=CHR′ and CHR=CR′R′′) and external (CH2=CR′R′′) olefins containing di and tri-substituted C=C bonds were detected. After successful oligomerization, synthesized polyα-olefins underwent hydrogenation process using Pd(0)-Hal catalyst to yield synthetic oils of PHex, POct, and PDec, respectively and then completion of the hydrogenation was confirmed by 1HNMR spectroscopy. The microstructure of the synthesized oligomers was rationalized using the ratio under the peak of CH + CH2/CH3 hydrogens (S1/S2) in 1HNMR spectra and the degree of oligomerization obtained from Mn. According to the results, the best match between theoretical and real S1/S2 is obtained when considering double bond isomerization in the synthesized PAOs. By knowing PAO molecular weight, a relationship between monomer type and S1/S2 in the PAO homopolymers was detected. Our suggested methodology can be generalized to the unknown PAO homopolymers to unravel their monomer type by simple 1HNMR and GPC analyses.

中文翻译：

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阳离子AlCl3/H2O催化体系合成聚α-烯烃的合理化链微观结构

摘要 本研究采用传统的 AlCl3/H2O 催化体系将 1-己烯、1-辛烯和 1-癸烯三种中等范围的 α-烯烃单体齐聚。分别通过 GPC 和 1HNMR 分析了低聚物的分子量和微观结构。通过1HNMR光谱，检测到含有二和三取代C=C键的内部（CHR=CHR'和CHR=CR'R''）和外部（CH2=CR'R''）烯烃。低聚成功后，合成的聚α-烯烃在Pd(0)-Hal催化剂下进行加氢反应，分别得到PHex、POct和PDec的合成油，然后通过1HNMR光谱证实加氢完成。使用 1HNMR 谱中 CH + CH2/CH3 氢峰下的比率 (S1/S2) 和从 Mn 获得的低聚度来合理化合成低聚物的微观结构。根据结果​​，在合成的 PAO 中考虑双键异构化时，获得了理论和实际 S1/S2 之间的最佳匹配。通过了解 PAO 的分子量，可以检测到 PAO 均聚物中单体类型与 S1/S2 之间的关系。我们建议的方法可以推广到未知的 PAO 均聚物，通过简单的 1HNMR 和 GPC 分析来解开它们的单体类型。检测到 PAO 均聚物中单体类型和 S1/S2 之间的关系。我们建议的方法可以推广到未知的 PAO 均聚物，通过简单的 1HNMR 和 GPC 分析来解开它们的单体类型。检测到 PAO 均聚物中单体类型和 S1/S2 之间的关系。我们建议的方法可以推广到未知的 PAO 均聚物，通过简单的 1HNMR 和 GPC 分析来解开它们的单体类型。