Initiation of free-radical polymerization by peroxypivalates studied by electrospray ionization mass spectrometry

2004 ◽  
Vol 42 (17) ◽  
pp. 4266-4275 ◽  
Author(s):  
Michael Buback ◽  
Holm Frauendorf ◽  
Philipp Vana
Keyword(s):  
Mass Spectrometry ◽  
Free Radical ◽  
Electrospray Ionization ◽  
Radical Polymerization ◽  
Electrospray Ionization Mass Spectrometry ◽  
Free Radical Polymerization ◽  
Ionization Mass Spectrometry ◽  
Ionization Mass

End-Group Analysis of Polymers by Electrospray Ionization Mass Spectrometry: 2-Methyl-1-[4-(methylthio)phenyl]-2-morpholinopropan-1-one Initiated Free-Radical Photopolymerization

2002 ◽  
Vol 55 (5) ◽  
pp. 315 ◽  
Author(s):  
P. Vana ◽  
T. P. Davis ◽  
C. Barner-Kowollik
Keyword(s):  
Mass Spectrometry ◽  
Free Radical ◽  
Electrospray Ionization ◽  
Methyl Acrylate ◽  
Electrospray Ionization Mass Spectrometry ◽  
Group Analysis ◽  
Ionization Mass Spectrometry ◽  
Ionization Mass ◽  
Free Radical Photopolymerization ◽  
End Group

End-group analysis of poly(methyl acrylate) and poly(dicyclohexyl itaconate) initiated by 2-methyl-1-[4-(methylthio)phenyl]-2-morpholinopropan-1-one (MMMP) has been performed by electrospray ionization mass spectrometry (ESI-MS). MMMP has been found to fragment into two radicals that are near-equally capable of initiating free-radical polymerization processes. The present study indicates the occurrence of significant termination by disproportionation in the polymerization of methyl acrylate. Additionally, it has been demonstrated that dicyclohexyl itaconate undergoes termination by disproportionation almost exclusively.

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