A very useful redox initiator for aqueous RAFT polymerization of N-isopropylacrylamide and acrylamide at room temperature

作者：Bai Wei; Zhang Liang; Bai Ruke^*; Zhang Guangzhao

来源：Macromolecular Rapid Communications, 2008, 29(7): 562-566.

DOI：10.1002/marc.200700823

• activation energy
• reversible addition fragmentation chain transfer (RAFT)
• redox initiator
• room temperature
• water-soluble polymers

Reversible addition fragmentation chain transfer (RAFT) polymerizations of N-isopropylacrylamide (NIPAM), and acrylamide (AM) were successfully performed in aqueous media at ambient temperature using a redox initiator, potassium persulfate (K(2)S(2)O(8)), and sodium thiosulfate (Na(2)S(2)O(3)). The molecular weight of the polymers obtained increases linearly with monomer conversion, molecular weight distribution is narrow even at high conversion (>90%), and a linear relationship exists between ln([M]o/[M]) and polymerization time. Moreover, self-chain extension reaction also proceeded successfully. All the results demonstrate that K(2)S(2)O(8)-Na(2)S(2)O(3) is a very efficient initiating system for the RAFT polymerizations of NIPAM. and AM in aqueous media at room temperature.

• 出版日期2008-4-1
• 单位中国科学技术大学