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In the production of Kevlar, the 2 monomers needed for its creation are reacted in a solution. Due to it being water-insoluble, sulfuric acid is used. My question: Can other chemicals be used as well (for examplke salicyclic acid), or is sulfuric acid absolutely necessary? Is there maybe a benefit to using it, or is it simply the cheapest?

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  • $\begingroup$ I think you need to tell us more about the process before we can answer this $\endgroup$ – Waylander Sep 2 '20 at 14:34
  • $\begingroup$ It's not for synthesis, but for spinning out of solution. $\endgroup$ – Mithoron Sep 2 '20 at 15:52
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    $\begingroup$ The sulfuric acid isn't just required to make the reaction go: it is a solvent. And–even if you could do the reaction in a different solvent–the properties depend on the spinning process which is solvent dependent so you would get different bulk polymer properties. $\endgroup$ – matt_black Sep 2 '20 at 16:18

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