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Topic: absorbtion  (Read 4319 times)

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rj1027

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absorbtion
« on: December 12, 2004, 02:56:02 PM »
The polymer utilized in diapers is the sodium salt of polyacrylic acid. This polymer will swell and absorb 500 times its own weight in water. Explain quantitatively why this occurs.

we know how to explain this problem, but we are having trouble trying to explain in it quadraticly or quanatatively.  

Offline Donaldson Tan

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Re:absorbtion
« Reply #1 on: December 16, 2004, 10:54:58 AM »
hmm.. have u work out the crystalline structure of the salt?
"Say you're in a [chemical] plant and there's a snake on the floor. What are you going to do? Call a consultant? Get a meeting together to talk about which color is the snake? Employees should do one thing: walk over there and you step on the friggin� snake." - Jean-Pierre Garnier, CEO of Glaxosmithkline, June 2006

mi_lan1981

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Re:absorbtion
« Reply #2 on: March 31, 2005, 06:10:30 AM »
would you like to tell me about k of adsorption and diffussion, and k equillibre. Thanks.

Offline Donaldson Tan

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Re:absorbtion
« Reply #3 on: March 31, 2005, 07:25:27 AM »
the polymeric salt must contain:

1. alot of empty space to contain water molecules
2. plenty of hydrophillic bonding sites
3. extended bonding among water molecules
4. size of water molecules relative to size of pores of at the polymer
"Say you're in a [chemical] plant and there's a snake on the floor. What are you going to do? Call a consultant? Get a meeting together to talk about which color is the snake? Employees should do one thing: walk over there and you step on the friggin� snake." - Jean-Pierre Garnier, CEO of Glaxosmithkline, June 2006

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