Diagram 7.1 shows various use of synthetic rubber.
Diagram 7.1(a) Based on Diagram 7.1, state the major use of synthetic rubber. [1 mark]
(b) State two characteristics of synthetic rubber which is used to make shoe soles. [2 marks]
(c) Diagram 7.2 shows the formation of vulcanised rubber.
(i) What is process R? [1 mark]
(ii) Draw the structure of vulcanised rubber in the space provided on Diagram 7.2. [1 mark]
(iii) State one function of sulphur in the formation of vulcanised rubber. [1 mark]
1. Heat resistant
3. Water resistant
(Choose any two)
(c)(iii) To prevent rubber polymer from sliding with each other