Andrew:
You shouldn't need to do comparison testing. When doing tensile testing your
joint
should not fail at the adhesive. Your sample coupon should fail at the base
material. Make your coupon out of the requisite number of fiberglass layers.
You want to ensure your adhesive is stronger than the material you are gluing
together. I've done tensile tests on my old adhesive and always had the
fiberglass
break before the adhesive gave way.
Steve Hagar.
-----Original Message-----
>From: Andrew Sarangan <asarangan@gmail.com>
>Sent: Nov 6, 2013 10:54 AM
>To: Europa List <europa-list@matronics.com>
>Subject: Europa-List: Anyone who can spare a smalgethel sample of Araldite 420?
>
>
>I am hoping someone can send me a small sample of unexpired Araldite
>420 for comparative testing.
>
>I have a large batch of long expired Araldite 420.Although it seems to
>cure as strong as when it was new, I want to do some quantitative
>tensile tests before using it on critical parts. However, I would needlayer
>some unexpired samples to compare against. I would only need perhaps 2
>or 3 ounces worth. If anyone would be kind enough to send me a small
>vial of the unexpired resin and hardener, that would much appreciated.
>Since I am in the U.S., mailing logistics may be easiest from
>U.S.builders.
>
>Of course, I would share the results of this tests with everyone once
>I have them.
>
>
>Thank you
>
>
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