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RE: [PSUBS-MAILIST] acrylic vs polycarbonate
Hi Rick,
Acrylic (Polymethyl Methacylate) has been studied very thouroughly by the
Navy and many other manufacturers. There is plenty of data available on
Acrylyc applications for underwater vehicles which is extremely reliable. I
assume that there is no such data for Polycarbonate yet.
--
Dino:
Poly Acetal looks initially promising, due to its great compressive
strength.
http://www.tiniusolsen.com/tplastic.html
Here is a nice primer on plastic properties. Note that water absorbtion
increases dimensions.
http://www.ptli.com/quality.asp
Here are the ASTM references.
http://www.nimr.org/nelsons_folly.html
Here's a nifty article about the development of astronaut helmet visors.
http://www.sandia.gov/news-center/news-releases/2002/mat-chem/brinker.html
Here's a hard clear coating. It might address water exposure too. Dunno.
Ryan and I hit the local U engineering library for the abstract. Curious
about using it to seal seacrete. The stuff can dissolve in some
depth/temperatures of the ocean. I don't like the idea of dissolving sub
hulls. I do like the idea of grown-to-shape 8000psi concrete, though. <:
Anybody with Excel want to explore the potential of such spherical seacrete
subs? I need the #s for a scifi story I'm writing.
D.
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