CHEM105 lab p. 1/2
Results #6—Polymer Synthesis Name ______________
Lab partner’s name ______________
Lab day: M T W Th F
• Put your answers in the blanks provided.
• Use correct significant figures.
• Attach calculations.
•
Attach 2 spectra
(nylon 6.6 [your nylon spectrum should also be in your lab
notebook] and your unknown).
Part 1
1. Calculate the number of moles of hexamethylenediamine _______________ and
adipoyl chloride ______________ used in your synthesis of nylon 6.6.
2. Which compound was the limiting reactant? ____________
3. Calculate the theoretical yield in grams. To do this you do not need to know the
molecular mass of the polymer. First, calculate the molecular mass of the repetitive
monomer unit of the polymer: _________________. Then multiply this number by
the number of moles of the limiting reactant. Theoretical yield: _______________
4. What was your actual yield of nylon 6.6 in grams? _________________
5. Calculate your overall percent yield for your synthesis of nylon 6.6. _____________
6. Using your IR spectrum, identify the wavelength of peaks that are in the predicted
absorption ranges for Nylon 6.6 in the table below:
Predicted
Absorption Ranges
(cm-1)
Type of Vibration causing
IR absorption
Measured
Absorption
(cm-1)
3500-3300
N-H Stretch of Amide
3000-2850
(Several bands)
H-C-H Stretches of Alkane
(You can just list one band)
1700-1625
C=O Stretch of Amide
CONTINUED
