中华医学超声杂志

应用化学 ›› 1992, Vol. 0 ›› Issue (5): 50-55.

• 研究论文 • 上一篇    下一篇

丁二烯聚合镍催化剂的磁性

陈滇宝, 梁玉华, 贺昭萍, 仲崇祺, 唐学明   

  1. 青岛化工学院, 青岛 266042
  • 收稿日期:1991-12-04 修回日期:1991-12-04 出版日期:1992-10-10 发布日期:1992-10-10
  • 基金资助:
    国家自然科学基金

MAGNETIC ANALYSIS OF NICKEL CATALYST SYSTEM FOR BUTADIENE POLYMERIZATION

Chen Dianbao, Liang Yuhua, He Zhaoping, Zhong Chongqi, Tang Xueming   

  1. Qingdao Institute of Chemical Technology, Qingdao 266042
  • Received:1991-12-04 Revised:1991-12-04 Published:1992-10-10 Online:1992-10-10

PDF

431

被引次数

9

摘要： 在通常镍系Ni(naph)2-Al(i-Bu)3-BF3OEt2和改型镍体系Ni(naph)2-Al(i-Bu)2(OR)-BF3OEt2中,助催化剂的还原能力顺序为Al(i-Bu)3>Al(i-Bu)2(OPhC8H17)>Al(i-Bu)2(OPhCH3)>Al(i-Bu)2(OPh)>Al(i-Bu)2(OC8H7)在Ni(naph)2-Al(i-Ba)2(OC8H17)-BF3OEt2体系中镍以Ni(Ⅰ)存在为主,其它体系中均Ni(0)和Ni(Ⅰ)共存为特点。Bd的预混能促进各体系中Ni(Ⅱ)→Ni(Ⅰ)的反应。在Ni(naph)2-Bd-Al(i-Bu)2(OPh)和Ni(naph)2-Bd-Al(i-Bu)2(OPhCH3)体系中有Ni(0)聚集体,显铁磁性,而其它体系均显顺磁性。

关键词: 丁二烯, 聚合, 镍催化体系, 磁化率

Abstract: The magnetisms of both the common nickel catalyst system, Ni(naph)2-Al(i-Bu)3-BF3OEt2-C4H6, and modified nickel catalystlsystems, Ni(naph)2-Al(i-Bu)2(OR)-BF3OEt2-C4H6(-OR is-OPh, -OPhCH3, -OPhC8H18, and -OC8H17), were measured. The order of the reducibility of the coeatalysts in the nickel catalyst systems as follows: Al(i-Bu)3>Al (i-Bu)2(OPhC8H17)>Al(i)-Bu)2(OPhCH3)>Al(i-Bu)2(OPh)>Al(i-Bu)2(OC8H17).For Ni(naph)2-Al(i-Bu)2(OC8H17)-BF3OEt2 system, Ni(Ⅱ) was mainly reduced to Ni (Ⅰ), during the pdynierization reation while Ni(Ⅰ) and Ni(0) were round in coexistence for other nickel catalyst systems. The aggregation of Ni(0) in Ni(naph)2-Bd-Al(i-Bu)2 (OPh) and Ni(naph)2-Bd-Al(i-Bu)2(OPhCH3)systems was ferromagnetic, and it was paramagnetic in other systems.

Key words: butadiene, Polymerization, nickel catalyst system, magnetic susceptibility

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