Photoinitiated cationic polymerization of monofunctional benzoxazine

• Published in: Journal of polymer science. Part A, Polymer chemistry Polymer chemistry, 2003-11, Vol.41 (21), p.3320-3328
• Main Authors: Kasapoglu, Fatmanur, Cianga, Ioan, Yagci, Yusuf, Takeichi, Tsutomu
• Format: Article
• Language: English
• Subjects: Applied sciences; benzoxazine; cationic polymerization; Exact sciences and technology; monofunctional; onium salts; photopolymerization; Physicochemistry of polymers; Polymerization; Polymers and radiations; ring-opening polymerization
• ISSN: 0887-624X; 1099-0518
• DOI: 10.1002/pola.10913

The photoinitiated ring‐opening cationic polymerization of a monofunctional benzoxazine, 3‐phenyl‐3,4‐dihydro‐2H‐1,3‐benzoxazine, with onium salts such as diphenyliodonium hexafluorophosphate and triphenylsulfonium hexafluorophosphate as initiators was examined. The structures of the polymers thus formed were complex and related to the ring‐opening process of the protonated monomer either at the oxygen or nitrogen atoms. The phenolic mechanism also contributed, but its influence decreased with decreasing monomer concentration. Thermal properties of the polymers were also investigated by differential scanning calorimetry and thermogravimetric analysis. © 2003 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 41: 3320–3328, 2003 The photoinitiated ring‐opening cationic polymerization of a monofunctional benzoxazine, 3‐phenyl‐3,4‐dihydro‐2H‐1,3‐benzoxazine, with onium salts such as diphenyliodonium hexafluorophosphate and triphenylsulfonium hexafluorophosphate as initiators was examined. The structures of the polymers thus formed were complex and related to the ring‐opening process of the protonated monomer either at the oxygen or nitrogen atoms. The phenolic mechanism also contributed, but its influence decreased with decreasing monomer concentration. Thermal properties of the polymers were also investigated by differential scanning calorimetry and thermogravimetric analysis.