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- Title
Synthesis of an azo macromolecular initiator composed of polyamide 4 and its initiation activity for the radical polymerization of vinyl monomers.
- Authors
Kawasaki, Norioki; Yamano, Naoko; Takeda, Sahori; Ando, Hisanori; Nakayama, Atsuyoshi
- Abstract
Polyamide 4 containing an azo group (azo-PA4) was synthesized by the ring-opening polymerization of 2-pyrrolidone when 4,4′-azobiscyanopentanoyl chloride was used as an initiator. It was possible to control the molecular weight (MW) of the azo-PA4s through the concentration of the initiator to some extent, and the highest weight-average MW obtained was 35 × 103. To assess the initiation activity of the azo-PA4 for radical polymerization, styrene (St) was used as a vinyl monomer. The azo-PA4 was found to initiate the radical polymerization of St to produce polymers. Analyses by FT-IR spectroscopy, 1H-NMR, and differential scanning calorimetry after the homopolymers [polyamide 4 (PA4) and polystyrene (PSt)] were removed by Soxhlet extraction showed that the remaining polymer was PA4- block-PSt. Azo-PA4 was also found to have an initiation activity for other vinyl monomers (methyl methacrylate, vinyl acetate, etc.). © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012
- Subjects
MACROMOLECULES; AZO compound synthesis; POLYAMIDES; MONOMERS; RING-opening polymerization; BLOCK copolymers; PYRROLIDINONES
- Publication
Journal of Applied Polymer Science, 2012, Vol 126, Issue S2, pE425
- ISSN
0021-8995
- Publication type
Article
- DOI
10.1002/app.36668