Chemistry Reference
In-Depth Information
Table 8.1
Some Peroxide Initiators for Radical Polymerizations
[3]
Types
Example
Temp. for
10-h
t
1/2
(
C)
Diocyl peroxides
73
C
O
O
C
O
O
Dibenzoyl peroxide
21
C(CH
3
)
3
(CH
3
)
3
CCOO C
O
Di-tertbutyryl peroxide
O
Peroxy esters
102
CH
3
C
O
O
C(CH
3
)
3
O
t-Butyl peracetate
Diolkyl peroxides
115
CH
3
CH
3
C
OO
C
CH
3
CH
3
Dicumyl peroxide
Diolkyl
peroxydicarbonates
45
O
O
CH
3
CH
3
H
C
O
C
O
O
C
O
C
H
C
2
H
5
C
2
H
5
Di-sec-butyl peroxydicarbonate
tert-
Alkylhydroperoxides
a
158
CH
3
C
OOH
CH
3
Ketone peroxides
CH
3
OOH
OOH
CH
3
and other
structures
105
C
OC
C
2
H
5
C
2
H
5
a
Hydroperoxides and ketone peroxides are used mainly with activators in redox initiation systems
(Section 8.5.2).
Transition metals can convert the radicals generated in reactions like (8-42) or
(8-43) into ions:
(8-44)
R
+ Co
2+
-
+ Co
3+
RO
