期刊
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
卷 48, 期 22, 页码 5206-5214出版社
WILEY
DOI: 10.1002/pola.24320
关键词
less activated vinyl monomers (LAMs); living polymerization; macromolecular design via interchange of xanthate (MADIX); radical polymerization; reversible addition fragmentation chain transfer (RAFT)
资金
- National Nature Science Foundation of China [20874069, 50803044, 20974071, 20904036]
- Specialized Research Fund for the Doctoral Program of Higher Education [200802850005]
- Soochow University
- Qing Lan Project
The living free radical polymerizations of three less activated monomers (LAMs), vinyl acetate, N-vinylcarbazole, and N-vinylpyrrolidone, were successfully achieved in the presence of a disulfide, isopropylxanthic disulfide (DIP), using 2,2 '-azoisobutyronitrile (AIBN) as the initiator. The living behaviors of polymerizations of LAMs are evidenced by first-order kinetic plots and linear increase of molecular weights (M(n)s) of the polymers with monomer conversions, while keeping the relatively low molecular weight distributions, respectively. The effects of reaction temperatures and molar ratios of components on the polymerization were also investigated in detail. The polymerization proceeded with macromolecular design via interchange of xanthate process, where xanthate formed in situ from reaction of AIBN and DIP. The architectures of the polymers obtained were characterized by GPC, H-1 NMR, UV-vis, and MALDI-TOFMS spectra, respectively. (C) 2010 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 48: 5206-5214, 2010
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