Chemical properties of water-soluble, nonionic azo compounds as initiators for emulsion polymerization

✍ Scribed by Hiroshi Torii; Keiji Fujimoto; Haruma Kawaguchi

• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 589 KB
• Volume: 34
• Category: Article
• ISSN: 0887-624X
• DOI: 10.1002/(sici)1099-0518(199605)34:7<1237::aid-pola10>3.0.co;2-a

✦ Synopsis

Yokohama 223, Japan SYNOPSIS Four kinds of water-soluble, nonionic azo compounds were studied in terms of their decomposition rate and initiator efficiency in radical polymerization, and then used for emulsion polymerization. They had relatively low initiator efficiency from 0.09 to 0.46. It was attributed to the susceptibility to a cage effect, depending on their molecular size and hydrophobicity. Four azo compounds initiated emulsion polymerization but nonionic latex particles were not obtained unexpectedly. Methanol-containing medium results in the formation of a bimodal particle size distribution as well as a bimodal molecular weight distribution.