Radiation-induced solid-state polymerization in binary systems. IX. Polymerization and foaming of multicomponent systems including inorganic acid and acrylic monomers

✍ Scribed by Isao Kaetsu; Akihiko Ito; Norio Sagane

• Publisher: John Wiley and Sons
• Year: 1973
• Tongue: English
• Weight: 262 KB
• Volume: 17
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.1973.070170912

✦ Synopsis

It was found that binary systems consisting of inorganic acid and organic amide or nitrile form a stable glassy phase owing to the 1a;ge molecular interaction between the components. The change in T,, values with changejn composition of these binary systems was studied. Gamma ray-induced polymerization of inorganic acid and acrylamide or acrylonitrile systems waa carried out in a supercooled phase. The polymerization rates in acrylamide-inorganic acid systems had a maximum at a temperature T, (3O0-5O0C higher than the glass transition temperature), but in acrylonitrile-inorganic acids systems there wm no maximum rate a t any temperature. Foaming occurred during irradiation in the polymerization of acrylamide-urea-sulfuric acid system. The insource foaming was attributed to the promoting effect of sulfuric acid for the decomposition of urea and the heat accumulation by the acceleration of the polymerization.