Chemistry Reference
In-Depth Information
(
Continued
)
Polymethacrylates
Grade
MW
T
g
(or
T
m
)
(
°
C)
E100
147,000
48
L100-55
278,000
110
L100
123,000
>
150
S100
123,000
>
150
RL
31,000
70
RS
30,000
65
14.1.1.10 Oxyethylene Polymers and Copolymers
Polyethylene Glycol
Structure
H
H
m
ranges from 4 to 181
HO
C
(CH
2
O
CH
2
)
m
C
OH
H
H
Synonyms
PEG, macrogol, polyoxyethylene glycol,
Carbowax, Lipoxol, Lutrol E, Pluriol E
Molecular weight range
(g/mol)
600
-
25,000
Note:
Grades with MW
∼
190-600 are liquids,
grades with MW
>
1000 are solids
Solubility parameter,
δ
(MPa
0.5
)
24
T
g
range (
°
C)
35 to
20
T
m
range (
°
C)
37-63
Water uptake (% water
at 75% RH)
0.9%, nonhygroscopic
Solvent solubility
Soluble in acetone, dichloromethane, ethanol
(95%), and methanol; they are slightly soluble in
aliphatic hydrocarbons and ether, but insoluble in
fats, fixed oils, and mineral oil
pH range where soluble
1
-
10
Amenable methods of
dispersion manufacture
Melt extrusion, spray drying
Fenoglide
, Gris-PEG
, Nimotop
Use in marketed
dispersion products
