TY - JOUR
T1 - Synthesis and characterization of dienic salts as addition-fragmentation type initiators for cationic polymerization
AU - Yoneyman, Berfu
AU - Onen, Aysen
AU - Yagci, Yusuf
PY - 2001
Y1 - 2001
N2 - Thiophenium pentadiene (TPD) and pyridinium pentadiene (PPD) salts with hexafluoroantimonate counteranion were prepared by reacting 5-bromo-1,3-pentadiene with thiophene and pyridine, respectively, and subsequent counteranion exchange with sodium hexafuoroantimonate, and characterized. The cationic polymerization of cyclohexene oxide (CHO) containing one of the dienic salts (TPD or PPD) and a respective free radical initiator was initiated upon thermolysis at 70°C or photolysis at λ > 300 nm. Benzoyl peroxide (BP), 2,2′-azobisisobutyronitrile (AIBN), phenylazotriphenylmethane (PAT), benzoin (B) and trimethoxybenzoyl dipenylacylphosphine oxide (TMDPO) were used as thermal and photochemical sources of free radicals. The contribution of addition-fragmentation and electron transfer mechanisms for the initiation is discussed.
AB - Thiophenium pentadiene (TPD) and pyridinium pentadiene (PPD) salts with hexafluoroantimonate counteranion were prepared by reacting 5-bromo-1,3-pentadiene with thiophene and pyridine, respectively, and subsequent counteranion exchange with sodium hexafuoroantimonate, and characterized. The cationic polymerization of cyclohexene oxide (CHO) containing one of the dienic salts (TPD or PPD) and a respective free radical initiator was initiated upon thermolysis at 70°C or photolysis at λ > 300 nm. Benzoyl peroxide (BP), 2,2′-azobisisobutyronitrile (AIBN), phenylazotriphenylmethane (PAT), benzoin (B) and trimethoxybenzoyl dipenylacylphosphine oxide (TMDPO) were used as thermal and photochemical sources of free radicals. The contribution of addition-fragmentation and electron transfer mechanisms for the initiation is discussed.
KW - Addition-fragmentation reactions
KW - Cationic polymerization
KW - Dienic salts
UR - http://www.scopus.com/inward/record.url?scp=0035697724&partnerID=8YFLogxK
U2 - 10.1163/156855501753210853
DO - 10.1163/156855501753210853
M3 - Article
AN - SCOPUS:0035697724
SN - 1385-772X
VL - 4
SP - 381
EP - 390
JO - Designed Monomers and Polymers
JF - Designed Monomers and Polymers
IS - 4
ER -