
可控/“活性”自由基聚合制备聚乙烯及聚卤代烯烃
Synthesis of Polyethylene and Polyhalogenated Olefin by Controlled/“Living” Radical Polymerization
可控/“活性”自由基聚合(CLRP)可以用于制备分子量分布窄、分子链缺陷少的聚合物,如聚乙烯(PE)、聚氯乙烯(PVC)、聚偏氯乙烯(PVDC)和聚偏氟乙烯(PVDF),且易控制上述单体与其他单体共聚得到嵌段聚合物。本文调研了近年来可控/“活性”自由基聚合(如碘转移聚合(ITP)、氮氧稳定自由基聚合(NMP)、可逆加成断裂链转移(RAFT)聚合和金属催化的活性自由基聚合(OMRP)等)制备聚乙烯和聚卤代烯烃等方面的工作,并指出了未来的发展方向。
Controlled/“living” radical polymerization(CLRP) can be used to synthesize polymers with narrow molecular weight distribution and few chain defects(such as Polyethylene(PE), polyvinyl chloride(PVC), polyvinylidene chloride(PVDC) and polyvinylidene fluoride(PVDF)), and it is easy to copolymerize the above monomer with other monomers to obtain block polymers. In this paper, we investigate the preparation of polyethylene and polyhalogenated olefin polymers by controlled/"living" radical polymerization, (for example, iodine transfer polymerization(ITP), nitroxide-mediated living radical polymerization(NMP), reversible addition fragmentation chain transfer(RAFT) polymerization and organometallic mediated radical polymerization(OMRP)) and point out the development trend.
Contents
2.1 RAFT method
2.2 OMRP method
3.1 NMP method
3.2 OMRP method
3.3 RAFT method
4.1 ITP method
4.2 RAFT method
5.1 ITP method
5.2 RAFT method
5.3 OMRP method
可控/“活性”自由基聚合 / 聚乙烯 / 聚卤代烯烃 {{custom_keyword}} /
controlled/“living” radical polymerization; / polyethylene / polyhalogenated olefins {{custom_keyword}} /
表1 RAFT聚合适用单体及对应的RAFT试剂的结构Table 1 Structure of suitable monomers and corresponding RAFT agents for RAFT polymerization |
Monomers | Structure of RAFT agents | ref | Monomers | Structure of RAFT agents | ref |
---|---|---|---|---|---|
vinylidene chloride | ![]() | 65, 67 | |||
ethylene | ![]() | 35 | |||
![]() | 65, 67 | ||||
![]() | 36 | ||||
![]() | 65, 67 78, 79 | ||||
![]() | 36 | ||||
![]() | 84, 80 81, 83 84, 85 | ||||
![]() | 38 | ||||
vinylidene fluoride | ![]() | 101, 102 | |||
vinyl chloride | ![]() | 48 | |||
![]() | 103 | ||||
![]() | 65, 67 | ||||
![]() | 104 | ||||
![]() | 105 | ||||
![]() | 68 |
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The authors have declared that no competing interests exist.
作者已声明无竞争性利益关系。
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