Hi Bob, I like the u´s and s´s for those uninitiated. But my question is at high temperature, like that found near or in a diesel engine, will the u´s be able to find those other u´s more easily and thus have a polymerization reaction anyway?
Tom -----Original Message----- From: bob allen To: [EMAIL PROTECTED] Sent: 1/04/05 17:24 Subject: Re: [Biofuel] Re: soybeanoil a bad choice for BD making? 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 --- [This E-mail scanned for viruses by Declude Virus] _______________________________________________ Biofuel mailing list [EMAIL PROTECTED] http://wwia.org/mailman/listinfo/biofuel Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuel archives at Infoarchive.net (searchable): http://infoarchive.net/sgroup/biofuel/ _______________________________________________ Biofuel mailing list [EMAIL PROTECTED] http://wwia.org/mailman/listinfo/biofuel Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuel archives at Infoarchive.net (searchable): http://infoarchive.net/sgroup/biofuel/
