Dispersion polymerization of styrene and methyl methacrylate initiated by macromonomeric azoinitiator

✍ Scribed by Yıldız, Ufuk ;Hazer, Baki

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 48 KB
• Volume: 265
• Category: Article
• ISSN: 0003-3146
• DOI: 10.1002/(sici)1522-9505(19990301)265:1<16::aid-apmc16>3.0.co;2-b

✦ Synopsis

The free radical dispersion polymerization of styrene (St) and methyl methacrylate (MMA) initiated by poly(oxyethylene) (PEO) macroazoinimer (MIM-400) in water/ethanol, was investigated at three different temperatures (50, 60 and 80 8C) for seven polymerization times (3, 6, 9, 12, 24, 36 and 48 h). PSt-PEO and PMMA-PEO networks were obtained. In each case, polymer gel fractions depend on the polymerization temperature and polymerization time. With the same initial concentration of MIM-400, maximum gel fraction was found at 80 wt.-% with St copolymerization while 100 wt.-% in case of copolymerization with MMA at 80 8C for 48 h. ZUSAMMENFASSUNG: Die mit einem Poly(oxyethylen)(PEO)-Macroazoinimeren (MIM-400) initierte radikalische Dispersionspolymerisation von Styrol (St) und Methylmethacrylat (MMA) in Wasser/Ethanol wurde bei drei verschiedenen Temperaturen (50, 60 und 80 8C) fu ¨r sieben Polymerisationszeiten (3, 6, 9, 12, 24, 36 und 48 h) untersucht. Dabei wurden PSt-PEO-bzw. PMMA-PEO-Netzwerke erhalten.