Chemistry Reference
In-Depth Information
O
C
O
CH
2
O
C
H
COOH
O
COOH
COOH
3
2
1
O
O
C
C
O
H
2
C
CH
2
O
HOOC - C
C - COOH
H
H
4
5
O
O
O
C
C
N
COOH
H
2
C
CH
2
C
O
NC - C
H
C - CN
H
HOOC
6
7
O
C
C
N
N
C
C
O
COOH
HOOC
8
Figure 4.2
Resin acid-based monomers for step-growth polymerisation
4.3.2 Side Chain Rosin-based Polymers
The synthesis of side chain rosin-based polymers is mainly achieved through radical
polymerisation of rosin-derived vinyl monomers. The AbA is usually transformed
into unsaturated monomers containing vinylic, acrylic or allylic groups.
Vinyl esters of resin acids
.
Vinyl esters from gum rosin are the first type of monomers
(
9
-
11
) for radical polymerisation and have been widely studied (
Figure 4.3
). In most
cases, vinyl esters of gum rosin were prepared by vinyl interchange of resin acids with
