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Old 05-06-2009, 07:31 PM   #1 (permalink)
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Default The Acrylic Revolution

By: Bill Daniels
(523K PDF)
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File Type: pdf The_Acrylic_Revolution .pdf (523.4 KB, 888 views)
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Old 05-06-2009, 07:48 PM   #2 (permalink)
 
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Very informative! Thanks!
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Old 05-06-2009, 07:48 PM   #3 (permalink)
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Very interesting, and all in one place. I learned a lot of new things off that! Thanks for sharing, Scott.

Dale
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Old 05-06-2009, 07:50 PM   #4 (permalink)
 
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Bravo!!
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Old 05-06-2009, 07:55 PM   #5 (permalink)
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Originally Posted by spiritwoodturner View Post
Very interesting, and all in one place. I learned a lot of new things off that! Thanks for sharing, Scott.

Dale

Please note that I only put these up. The are written by our membership. We should thank Bill for sharing.
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Old 05-06-2009, 07:57 PM   #6 (permalink)
 
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Bill, thanks that was very informative...
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Old 05-06-2009, 08:12 PM   #7 (permalink)
 
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Bill, thanks for that article, very informative.

However, you refer to the PR resin type blanks as thermoplastics, they are actually thermosetting

From Wikipedia on Polyester resins:

Polyester resins are thermosetting; "thermosetting" means the plastic softens when initially heated, but sets permanently rigid once it has cooled (as opposed to "thermoplastics", which re-soften with heat). Polyester resin is often purchased in liquid form for the production of glass-reinforced plastic. In this case, a catalyst (typically methyl ethyl ketone peroxidebenzoyl peroxide is a somewhat less hazardous alternative suitable for some purposes.(MEKP) (also known as butanone peroxide) is used to initiate the polymerization reaction;


In general all the resins you refer to in your article are of the thermosetting type, ie they cure by heat or catalyst, once this process has taken place it cannot be reversed.


Thermoplastics OTH can be re-melted after processing.

Sorry, once a chemist, always a chemist!
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