The table 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^{\circ}\text{C}∘C) | Softening temperature (∘C^{\circ}\text{C}∘C) | Stiffness (MPa\text{MPa}MPa) | Tensile strength (MPa\text{MPa}MPa) | |
|---|---|---|---|---|
| X | 115 | 60 | 900 | 18 |
| Y | 230 | 125 | 2800 | 55 |
| Z | 210 | 80 | 1800 | 40 |
A manufacturer wants to use a polymer to make a plastic container that can be safely sterilized in boiling water (100∘C100^{\circ}\text{C}100∘C). Suggest and explain which polymer, X, Y, or Z, the manufacturer should use.
Polymer: __________
Reason: __________
The repeating unit of polymer Y is shown below:
[CH3H∣∣−C−C−∣∣HH]n\left[ \begin{array}{cc} \text{CH}_3 & \text{H} \\ | & | \\ -\text{C} & \hspace{-0.5em}-\text{C}- \\ | & | \\ \text{H} & \text{H} \end{array} \right]_nCH3∣−C∣HH∣−C−∣Hn
Draw the structure of the monomer from which polymer Y is made.
Some naturally occurring substances are polymers. Match each monomer with its naturally occurring polymer: