This is the nylon 6,6 reaction

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Having these data available, I would need to know the theoretical quantities, in grams, of the monomers

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My attempt: Adipoyl chloride is our limiting reactant so theoretical mass is the weighted mass. Hexamethylenediamine and adipoyl chloride are in 1:1 ratio, so amine theoretical mol are the same of adipoyl chloride: if the calculations are correct, $0.0022\;\text{mol}$. From which, the theoretical mass of amine will be

$$ 0.0022\;\text{mol} \times 116.21\;\text{g/mol} = 0.2557\;\text{g} $$

Any advice?

  • 1
    $\begingroup$ No ! Your calculation gives the mass of the dimer, with $n$ = $2$. But the nylon 6,6 is a polymer with a rather high value of $n$. Its molar mass is probably higher than $100'000$. I don't know whether this value is known. $\endgroup$
    – Maurice
    Jun 19 at 16:51
  • $\begingroup$ I changed the question: what I need to know are the theoretical quantities, in grams, of the monomers. I gave it a try: could you tell me if this is correct? $\endgroup$ Jun 19 at 18:29
  • 1
    $\begingroup$ Your calculation is correct. $\pu{2.2 mmol}$ of the amine weighs $\pu{0.2557 g}$ and this will react with $\pu{2.2 mmol}$ adipoyl chloride, which weighs $\pu{0.4020 g}$ $\endgroup$
    – Maurice
    Jun 19 at 18:55


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