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Date:         Tue, 20 Nov 2001 19:15:52 +1200
Reply-To:     Andrew Grebneff <andrew.grebneff@STONEBOW.OTAGO.AC.NZ>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Andrew Grebneff <andrew.grebneff@STONEBOW.OTAGO.AC.NZ>
Subject:      Re: The lid is *NOT* Plastic!
In-Reply-To:  <00c001c17131$a43d46e0$4d9080d1@hppav>
Content-Type: text/plain; charset="us-ascii" ; format="flowed"

>  I once caught the nose of a very expensive Olympic
>slalom kayak on fire by mixing too hot a batch of resin to get the endpour
>for the bow to set up quickly.  Exothermic reaction I was told.


Chemists. The setting reaction of polyester resin with
methylethyl-ketone-phosphate catalyst releases heat; put too much
MEKP in, or have too large a solid lump, and it gets so hot it splits
and smokes... a bit more and up it goes. A reaction which PRODUCES
heat is endothermic (internal heat), one which takes heat-energy to
induce is exothermic (outside heat). Ask any biologist! The chemists
have it wrong.
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