PHOTOINITIATORS AND PHOTOINITIATION .12. THE AROMATIC KETONE T-AMINE TYPE-II PHOTOINITIATING SYSTEM - IDENTIFICATION OF THE INITIATING SPECIES/

Authors
HAGEMAN HJ
Citation
Hj. Hageman, PHOTOINITIATORS AND PHOTOINITIATION .12. THE AROMATIC KETONE T-AMINE TYPE-II PHOTOINITIATING SYSTEM - IDENTIFICATION OF THE INITIATING SPECIES/, Macromolecular rapid communications, 18(5), 1997, pp. 443-449
Citations number
25
Categorie Soggetti
Polymer Sciences
Journal title
Macromolecular rapid communications → ACNP
ISSN journal
10221336
Volume
18
Issue
5
Year of publication
1997
Pages
443 - 449
Database
ISI
SICI code
1022-1336(1997)18:5<443:PAP.TA>2.0.ZU;2-S
Abstract
The system benzophenone/N, N-dimethylaniline (DMA) representing a typi c al Type-II photoinitiating system is irradiated in the presence of 1 ,1-di(p-tolyl)ethylene (DTE) as a non-polymerising model substrate. In the presence of DMA the excited triplet state of benzophenone is not quenched by DTE and N-[3,3-di(p-tolyl)propyl] -N-methylaniline is isol ated as the major product, indicating the DMA derived radical as the m ain initiating species in such Type-II systems. The mechanism of the r eaction and its implications are discussed.