Question 1:
Name the polymer for natural rubber.
Answer:
Polyisoprene
Name the polymer for natural rubber.
Answer:
Polyisoprene
Question 2:
The presence of acid in latex causes latex to coagulate.
(a) State the function of acid in the coagulation process of latex.
(b) Describe the coagulation process of latex.
Answer:
(a) The presence of hydrogen ions, H+ in the acid neutralises the negatively charged protein membrane.
(b)
– Hydrogen ions, H+ in the acid neutralise the negatively charged protein membrane.
– Rubber particles collide with one another that lead the protein membrane to break.
– Rubber polymers entangle that cause latex to coagulate.
The presence of acid in latex causes latex to coagulate.
(a) State the function of acid in the coagulation process of latex.
(b) Describe the coagulation process of latex.
Answer:
(a) The presence of hydrogen ions, H+ in the acid neutralises the negatively charged protein membrane.
(b)
– Hydrogen ions, H+ in the acid neutralise the negatively charged protein membrane.
– Rubber particles collide with one another that lead the protein membrane to break.
– Rubber polymers entangle that cause latex to coagulate.
Question 3:
What is the advantage of the irradiation vulcanisation process over sulphur vulcanisation process?
Answer:
Free from sulphur and chemical allergies.
What is the advantage of the irradiation vulcanisation process over sulphur vulcanisation process?
Answer:
Free from sulphur and chemical allergies.
Question 4:
Compare and contrast vulcanised and unvulcanised rubber.
Answer:
Similarity: Vulcanised and unvulcanised rubber originate from latex.
Compare and contrast vulcanised and unvulcanised rubber.
Answer:
Similarity: Vulcanised and unvulcanised rubber originate from latex.
