This question is about materials used to make shopping bags.
Poly(ethene) bags can be recycled or sent to landfill where they do not biodegrade.
Which stage of a life cycle assessment (LCA) would contain this information?
Ethene is the monomer used to produce poly(ethene). Ethene is obtained from crude oil.
Which two processes are used to produce ethene from crude oil?
Table 1 shows the effect of heating on two different polymers.
Table 1
| Polymer | Effect of heating |
|---|---|
| Polymer C | Softens and melts when heated |
| Polymer D | Does not melt when heated |
What type of polymer is Polymer D?
Why does Polymer D behave differently to Polymer C when heated? You should refer to crosslinks in your answer.