The table below shows information about three different polymers, X, Y, and Z.
Tensile strength is the amount of load a material can take before it breaks.
| Melting point (°C) | Softening temperature (°C) | Stiffness (MPa) | Tensile strength (MPa) | |
|---|---|---|---|---|
| X | 125 | 78 | 900 | 18 |
| Y | 245 | 115 | 3100 | 62 |
| Z | 210 | 85 | 1700 | 45 |
A company wants to use a polymer to make reusable baby bottles that must be sterilized in boiling water (100 ∘C100\,^\circ\text{C}100∘C).
Suggest and explain which polymer, X, Y or Z, the company should use.
This is the repeating unit in polymer Y:
[ClH∣∣−C−C−∣∣HH]n\left[ \begin{array}{cc} \text{Cl} & \text{H} \\\\ | & | \\\\ -\text{C} & -\text{C}- \\\\ | & | \\\\ \text{H} & \text{H} \end{array} \right]_nCl∣−C∣HH∣−C−∣Hn
Draw the structure of the monomer from which polymer Y is made.
Some substances are naturally occurring polymers.
Connect each monomer with its naturally occurring polymer: