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Methyl cellulose is formed by reaction with methyl chloride:
Cell-O
-
+ CH
3
Cl
→
Cell-OCH
3
+ Cl
-
Cellulose esters (of organic or inorganic acids):
-
Cellulose acetate: esterification using acetic acid
anhydride (acid catalysed):
-
Cell-OH + CH
3
(C=O)O(C=O)CH
3
→
Cell-O-(C=O)-CH
3
Cellulose acetate is soluble in organic solvents (DS> 2.2: soluble in acetone).
Figure: Cellulose triacetate (DS = 3)
-
Cellulose nitrate: Cell-NO
2
(explosive)
O
O
O
O
CH
2
O
C O
CH
3
C
C O
CH
3
O CH
3