| Date | November 2021 | Marks available | 3 | Reference code | 21N.2.SL.TZ0.3 |
| Level | SL | Paper | 2 | Time zone | no time zone |
| Command term | Explain | Question number | 3 | Adapted from | N/A |
Question
Explain how the molecular structure of thermoplastics is affected by heat.
Markscheme
Thermoplastics have a linear chain structure/weak polymer bonds;
Which allows them to be heated and reformed;
Into a new shape repeatedly;
Award [1] for identifying how the molecular structure of thermoplastics is affected by heat and [1] for each development of the explanation up to [3 max].
Examiners report
Good general understanding of the molecular structure of thermoplastics and the effect of heat.
