Figure 1 shows the structure of a molecule of 1,1-difluoroethene.

1,1-difluoroethene can polymerise to form the addition polymer poly(1,1-difluoroethene), commonly known as PVDF.
Draw a diagram to show the structure of the repeating unit of this polymer.
Practise Edexcel GCSE Chemistry Polymers with exam-style questions for Foundation and Higher tier. 100 questions, matched to the Edexcel GCSE Chemistry (1CH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.