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Manufacturing
Method |
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S-LEC B/K is
manufactured from Polyvinyl alcohol (PVA)
by reacting aldehyde.
Refer to the formula shown below.
| Raw
Materials > Reaction > Washing
> Drying > Finished Product |
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The outline of
the manufacturing process is as follows |
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Structural
Formula |
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In the chemical
reaction given above, 100% butyralization
cannot take place.
According to P.J.Flory, the maximum butyralization
degree expected is 81.6 mol %, or 86.47 wt
%.
Therefore, a considerable amount of hydroxyl
is left behind in S-LEC B/K.
Also, when saponifcation occurs (the PVA manufacturing
process), a small amount of acetyl is behind.
Therefore, the chemical structural formula
of S-LEC B/K is as shown below.
The physical and
chemical properties of S-LEC B/K will differ
depending upon the ratio of the elements shown
n the formula,
and the degree of polymerization greatly influences
its thermal and mechanical characteristics.
And the viscosity of solution. |
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