What
is the monomer of nylon 6
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Answers
Answer:
caprolactam...........
hope it will help you
Explanation:
Nylon 6 is an awful lot like our friend nylon 6,6. You can look at the picture if you don't believe me.
But making nylon 6 is lot different from nylon 6,6. First of all, nylon 6 is only made from one kind of monomer, a monomer called caprolactam. Nylon 6,6 is made from two monomers, adipoyl chloride and hexamethylene diamine.
caprolactam monomer
But enough small talk. Let's get on with the business of turning caprolactam into nylon 6. Nylon 6 is made by heating caprolactam to about 250 oC with about 5-10% water thrown in. So what happens to caprolactam when there's water around? The carbonyl oxygen looks around, and sees a water molecule, and sees how easy it would be to steal one of the water's hydrogen atoms. Now as is often the case, a little thing like this that seem harmless enough can grow into something much bigger. If you watch, you'll see that caprolactam's greed is going to get the better of
The carbonyl oxygen donates a pair of electrons to the hydrogen atom of water, thus stealing the hydrogen from the water. This gives us a protonated carbonyl, and a free hydroxyl group. Keep this hydroxyl group in mind, because it is going to come back to haunt greedy ol' caprolactam. But first, let's remember that the carbonyl oxygen now has a positive charge. It doesn't like this, so it swipes a pair of electrons from the carbonyl double bond, leaving the positive charge on the carbonyl carbon atom.
But carbocations are not happy critters. Putting a carbocation in a molecule is just begging for some nucleophile to come along and attack it. Nucleophile? Did someone say nucleophile? I think there's one nearby. It's that old hydroxide ion that was left when caprolactam stole the proton from the water molecule. This little hydroxide ion never really worked through the negative emotions of having lost its proton to caprolactam. Still harboring a lot of hostility, it attacks the carbocation.