Chemistry Reference
In-Depth Information
-bromo-succinimide [
235
].
The product can also subsequently be used for further reactions [
235
], as, for instance, phosphoryla-
tion with triethyl phosphite:
Poly(2,6-dimethyl-1,4-phenylene oxide) can be brominated with
N
(OC
2
H
5
)
2
CH
2
Br
P
O
NBS
CCl
4
O
O
O
9.4.4 Reactions of Acrylic, Methacrylic, and Related Polymers
The functional groups of polymers from acrylic and methacrylic esters can undergo all the typical
reactions of such groups. There are, therefore, numerous reports in the literature on such reactions.
9.4.4.1 Reduction of the Ester Groups
reductions
Perhaps the most reported reactions of these polymers are
of the functional groups. Among
them is the reaction with lithium aluminum hydride to reduce the ester groups. The success, however,
depends upon the reaction medium. Poly(methyl methacrylate) can be reduced to poly(methallyl
alcohol) in ether solvents [
236
]:
LiAlH
4
+
O
O
OH
The results, however, are inconclusive, because combustion analyses fail to match the theoretical
composition for poly(methallyl alcohol). It is impossible to tell to what extent the reduction takes
place [
236
]. Inconclusive results are also obtained in similar reductions of poly(methyl acrylate) in
mixtures of tetrahydrofuran and benzene. The product of such reduction is acetylated with acetic
anhydride in pyridine [
237
] as follows:
+
LiAlH
4
O
O
OH
N
O
+
O
OH
O
O
