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个人信息Personal Information
教授
博士生导师
硕士生导师
性别：女
毕业院校：中科院化学所
学位：博士
所在单位：化工学院
学科：高分子化学与物理. 高分子材料
办公地点：化工实验楼A305
电子邮箱：hniu@dlut.edu.cn
Synthesis of Hyperbranched Polyisoprene by Isoprene/Dimethyl-di-2,4-Pentadieneyl-(E,E)-Silane Copolymerization Catalyzed with Half-Sandwich Scandium Complex
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论文类型：期刊论文
发表时间：2020-08-01
发表刊物：MACROMOLECULAR CHEMISTRY AND PHYSICS
收录刊物：SCIE
卷号：221
期号：15
ISSN号：1022-1352
关键字：half-sandwich scandium catalyst; hyperbranching; polyisoprene
摘要：A series of hyperbranched polyisoprenes (HBPIps) are synthesized by copolymerization of isoprene and a novel dipentadiene-containing branching agent dimethyl-di-2,4-pentadieneyl-(E,E)-silane (DMDPS) catalyzed by the half-sandwich scandium complex (C5Me4SiMe3)Sc(CH2C6H4NMe2-o)(2)/[Ph3C][B(C6F5)(4)]. Due to the high activity of DMDPS in copolymerization, and the very similar reactivity of the two pentadieneyl groups in DMDPS, the gelation reaction is successfully avoided in the highly branched products. The structural parameter branching factor (g ') of the HBPIps is determined to evaluate the branching degree. It is proved that in the polymerization both the concentration of DMDPS and isoprene exhibits significant influence on branching degree of HBPIps. By using the DMDPS as branching agent and simply controlling the polymerization conditions, high branching degree ofg ' = 0.35 is achieved.