Cationic photopolymerization of 1,3-di(9-carbazolyl)-2-propanol glycidyl ether
An absorbance probe method was used for the investigation of photolysis of cationic photoinitiators. The rates of the photolysis of diphenyliodonium hexafluorophosphate ( DPIH ), diphenyliodonium tetrafluoroborate ( DPIB ), di( tert -butylphenyl)iodonium tetrafluoroborate ( DTIB ), di( tert -butylph...
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Published in | Monatshefte für Chemie Vol. 139; no. 8; pp. 887 - 893 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
Vienna
Springer-Verlag
01.08.2008
|
Subjects | |
Online Access | Get full text |
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Summary: | An absorbance probe method was used for the investigation of photolysis of cationic photoinitiators. The rates of the photolysis of diphenyliodonium hexafluorophosphate (
DPIH
), diphenyliodonium tetrafluoroborate (
DPIB
), di(
tert
-butylphenyl)iodonium tetrafluoroborate (
DTIB
), di(
tert
-butylphenyl)iodonium bromate (
DTIBr
), triphenylsulfonium hexafluorophosphate (
TPS
) and cyclopropyldiphenylsulfonium tetrafluoroborate (
CPS
) were studied in the presence of acid indicator quinaldine red (
QR
) in acetonitrile. Diphenyliodonium hexafluorophosphate and triphenylsulfonium hexafluorophosphate showed the highest photolysis rate. Photopolymerization of 1,3-di(9-carbazolyl)-2-propanol glycidyl ether (
DCPGE
) initiated with the iodonium and sulfonium salts in bulk and in solution was studied. It was established that the highest initial rate of polymerization is characteristic of
DCPGE
photopolymerization initiated with
DPIH
and
TPS
in bulk. The oligomers of
DCPGE
of number average molecular weight (
) ranging from 710 to 1220 were obtained in these reactions in bulk and those with
ranging from 1300 to 1600 were obtained in solution. |
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ISSN: | 0026-9247 1434-4475 |
DOI: | 10.1007/s00706-008-0852-1 |