Message-Id: <5.1.0.14.2.20020323202303.02788360@pop3.olsusa.com>
Date: Sat, 23 Mar 2002 20:24:35 -0500
To: lancair.list@olsusa.com
From: Marvin Kaye <marvkaye@olsusa.com>
Subject: Re: Isopropyl Alcohol?
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"; format=flowed
Reply-To: lancair.list@olsusa.com

          <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>>
          <<  Lancair Builders' Mail List  >>
          <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> 
>>
Posted for N295VV@aol.com:

I have to say that the mention of Isopropyl Alcohol being used to prepare 
bond surfaces by a person with such credentials rather amazed me.

Now, that being said, I would request that Mr. Dorworth provide some 
back-up scientific data for this statement.  I would like to get a 
reference to a controlled test where oil and mold release contaminated 
samples were prepared with Acetone and Isopropyl Alcohol and the coupons 
subjected to pulling tests until failure.

Dan Schaeffer has performed these tests using MeCl2 and found that the 
parent substrate failed first.  He did his homework.

I am familiar with the coupon test.  I performed it as a budding chemist at 
Sundstrand Aviation in the early sixties on aluminum coupons bonded with 
epoxy.

So, I ask Mr. Dorworth to provide us with a copy of a paper or a reference 
that shows substrate failure first when Acetone or IPA is 
used--particularly on oily and release contaminated surfaces of fiber glass 
or carbon fiber.

Such a reference would set my mind at ease.

David Jones


>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
LML website:   http://members.olsusa.com/mkaye/maillist.html
LML Builders' Bookstore:   http://www.buildersbooks.com/lancair
Please remember that purchases from the Builders' Bookstore
assist with the management of the LML.

Please send your photos and drawings to marvkaye@olsusa.com.
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>