Polymerization of vinyl monomers using a novel trifunctional iniferter

✍ Scribed by Shu-Hui Qin; Kun-Yuan Qiu

• Publisher: John Wiley and Sons
• Year: 2000
• Tongue: English
• Weight: 153 KB
• Volume: 38
• Category: Article
• ISSN: 0887-624X
• DOI: 10.1002/(sici)1099-0518(20000601)38:11<2115::aid-pola210>3.0.co;2-i

✦ Synopsis

A novel trifunctional iniferter with photoinduced and thermal chemical dissociation functional groups in one molecule, diethyl 2,3-dicyano-2,3-di(p-N,N-diethyldithiocarbamylmethyl)phenylsuccinate (DDDCS), was successfully synthesized. The bulk polymerizations of styrene and methyl methacrylate initiated by DDDCS under UV-light irradiation and heating, respectively, were studied. The polymerizations proceeded via a living polymerization process in both cases; that is, the conversion and molecular weight of the resulting polymer increased linearly with increased reaction time. The resulting polymers, containing ␣and -N,N-diethyldithiocarbamyl end groups, served as macroiniferters for further block copolymerization. Electron paramagnetic resonance studies showed that DDDCS initiated as a photoiniferter under UV-light irradiation by reversible COS-bond dissociation and as a thermal iniferter under heating by reversible hexasubstituted COC-bond dissociation.