Thankyou!
This was the point I was trying to make: "... you will reduce
polymerization". But not eliminate it.
"... the time to reach a specified degree of polymerization will be
extended by dilution." But it still won't be eliminated.
Thanks again.
Best wishes
Keith
Howdy Kieth and Jan
At the risk of looking foolish as I am an organic chemist, but don't
have much experience with polymer chemistry- here goes
Polymerization is a molecule molecule reaction. A compound with
double carbon carbon bond is particularly susceptible free radical
oxidation. Let's call them U. Compounds without carbon carbon double
bounds are relatively unreactive. We will call these S. Oxygen
will activate one molecule, U, but for polymerization to occur, the
activated molecule must encounter another U, then the now covalently
bonded pair, must encounter another U, and so on. Collisions of
activated U with S don't result in a reaction.
It seems to me that if you "dilute" U with S, that you will reduce
polymerization.
Or how about this. An activated molecule has only a finite amount
of time to react. If an activated molecule U "bumps into" another U
then chain growth continues. But if activated U bumps into S, no
reaction occurs, other than U reacting internally, which also stops
chain growth.
Polymer chemists can modulate the number of molecules in a chain
(chain length) by addition of non polymerizing stuff.
Being a right brain guy, this discussion is made more difficult, as
I can't draw all the pictures which exemplify the points I am trying
to make. :(
The long and short of it (no pun intended) chain length of polymers
will be reduced by dilution of biodiesel blended from high IV oils
with low IV oils. Put another way, the time to reach a specified
degree of polymerization will be extended by dilution.
Keith Addison wrote:
Hello Keith and thank you for your input. I agree with you, blending an oil
with a high IV with one with a lower, should produce an average IV.
--
Bob Allen
http://ozarker.org/bob
"Science is what we have learned about how to keep
from fooling ourselves" — Richard Feynman
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