Study on 2-thiophenecarbonyl chloride-quenched olefin polymerization with α-diimine nickel catalysts
作者： Yintian Guo , Pengjia Yang , Shuangjie Zhang , Baiyu Jiang , Akbar Khan
DOI: 10.1007/S13726-017-0596-Z
关键词:
摘要: The number of active centers in α-diimine nickel-catalyzed olefin homogeneous polymerization system is rarely studied before. A systemic study on quenching method with 2-thiophenecarbonyl chloride (TPCC) catalytic presented. Ethylene and propylene polymerizations catalyzed nickel catalysts (ArN=C(An)–C(An)=NAr)NiBr2 (cat.1, Ar=2,6-C6H3(i-Pr)2) (ArN=C(C12H8)C=NAr)NiBr2 (cat.2, Ar=2,6-C6H3(i-Pr)2, C12H8=acenaphthene-1,8-diyl) were quenched by TPCC. potential side reaction between TPCC alkyl aluminum-terminated polymer chain caused transfer to cocatalyst under different conditions was investigated. Samples obtained TPCC/AlMAO molar ratios had similar sulfur contents; a confirmation that the excess did not cause obvious reactions which could lead place more thiophene groups chains. Moreover, when time range 3–20 min, contents remained stable value Npol (number moles chains) obviously changed, supporting sufficient already accomplished within first 3 min. We claimed be ignored controllable conditions. confirmed an effective agent system. also established.
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