| GOHSENOL
products can be roughly categorized
into two types |
| 1 |
Those whose
acetic groups have all been substituted
with hydroxyl groups through saponification
(fully saponified type) |
| 2 |
Those
whose acetic groups have mostly
been substituted with hydroxyl
groups through saponification
but retain certain portion of
acetic groups (partially saponified
type) |
|
|
 |
| The relation between
the fully saponified type and partially saponified
type can be illustrated as below. |
|
 |
| m+n stands for a polymerization degree,
while [m/(m+n)]×100 represents
a saponification degree. Note that a
polymerization degree is usually indicated
as a viscosity at a particular concentration
(usually, 4 % at 20°c). |
|
|
 |
|
|
| Characteristics
as Governed by their Polymerisation Degree
and Saponification Degree |
|
| The characteristics of GOHSENOL products
are governed by their polymerization degree
and saponification degree, as summarized below: |
|
| |
Polymerization
Degree |
| |
Higher |
Lower |
|
Solution
viscosity |
Higher |
Lower |
|
Solubility |
Greater |
Weaker |
|
Solubility |
Less water-soluble |
More water-soluble |
| |
Saponification
Degree |
| |
Higher |
Lower |
|
Solution
viscosity |
Somewhat
higher |
Somewhat
lower |
|
Membrane
strength |
Somewhat
stronger |
Somewhat
weaker |
|
Solubility |
Less soluble
in cold water |
More soluble
in cold water |
|
|
