Re: pinhole catalysts

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From: Geoff Ruth (gruth@leadershiphigh.org)
Date: Wed Oct 29 2003 - 18:13:13 PST 

Message-Id: <p05200f14bbc623a362e9@[192.168.123.175]>
Date: Wed, 29 Oct 2003 18:13:13 -0800
From: Geoff Ruth <gruth@leadershiphigh.org>
Subject: Re: pinhole catalysts

Neil,

Do you know how these inhibitors work? My guess is that they
chemically bond to the least stable part of the substance that would
otherwise react, in order to create a more stable structure. If I'm
right, then I don't think that they are technically catalysts, since
they're used up as part of the substance and not able to catalyze
reactions repeatedly.

What do you think?
Geoff

>Hi Geoff,
>There are "negative" catalysts that can raise the activation energy of
>chemical reactions. One example is the oxidation inhibitors blended
>with rubber
>tires to prevent cracking of the rubber. When UV (sunlight) shines
>on the rubber
>surface, the inhibitor prevents the carbon bonds the rubber form breaking.
>Neil Fetter
>
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