Acid resistance of Polyethelene

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    Acid Resistance
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HCL (hydrochloric acid) does not react with LDPE (low-density polyethylene) due to the chemical structure of LDPE, which is composed of repeating units of ethylene (C2H4). The discussion highlights that LDPE is resistant to acids because there are no energetically or kinetically favorable reactions between HCL and LDPE. To understand this further, one could compare LDPE with other plastics that are not acid-resistant to explore their reactions with acids. The conversation emphasizes the lack of a specific reaction between HCL and LDPE, reinforcing the material's stability in acidic environments.
bsodmike
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Hi,

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

Thanks, Mike.
 
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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.
 
Well, PE is C_2H_4, repeating 'n' units. I guess, you're right in terms of there being no possible reaction with HCL...
 

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