Acid resistance of Polyethelene

In summary, the conversation discusses the resistance of LDPE to acid and the lack of possible reactions between the two. It is suggested to compare LDPE with other plastics and propose specific reactions to better understand its acid resistance.
  • #1
bsodmike
82
0
Hi,

Would be interested to know why HCL cannot eat through LDPE for example.

Thanks, Mike.
 
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  • #2
It's hard to prove a negative. Why does it withstand acids? Because they don't react with it; because there's no reaction that's energetically or kinetically possible.

You could look at other plastics that aren't acid resistant, and find out how they react with acid and why that doesn't apply to PE. Or you could suggest some specific reaction between acids and PE that might occur, and ask for an explanation why it doesn't, but I don't really know how to answer your question as stated.
 
  • #3
Well, PE is [tex]C_2H_4[/tex], repeating 'n' units. I guess, you're right in terms of there being no possible reaction with HCL...
 

1. How does the acid resistance of Polyethelene compare to other materials?

Polyethelene has excellent acid resistance compared to other materials. It is highly resistant to most acids, including strong mineral acids, organic acids, and weak acids. This makes it a popular choice for industrial applications where exposure to acids is common.

2. What makes Polyethelene resistant to acids?

Polyethelene is resistant to acids due to its chemical structure. It is a polymer with a long chain of repeating ethylene units, which gives it a non-polar and hydrophobic nature. This means that it is not easily dissolved or affected by acids, as they are typically polar and water-based.

3. Can Polyethelene withstand high concentrations of acids?

Yes, Polyethelene can withstand high concentrations of acids. Its acid resistance is not affected by the concentration of the acid, as long as it is not exposed to extremely harsh or concentrated acids for extended periods of time.

4. Is there any acid that Polyethelene is not resistant to?

While Polyethelene is highly resistant to most acids, it is not resistant to some strong oxidizing acids, such as concentrated sulfuric acid or nitric acid. These acids can cause degradation and damage to the polymer.

5. How can the acid resistance of Polyethelene be improved?

The acid resistance of Polyethelene can be improved by adding fillers or reinforcing agents, such as carbon black or glass fibers, to the polymer. These additives can increase the strength and stability of the material, making it more resistant to acids. Additionally, using higher molecular weight grades of Polyethelene can also improve its acid resistance.

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