Which of the following has cross-links?
Vulcanised rubber
Melamine
Low density polythene
Both (a) and (b) are correct
Vulcanised rubber → Sulphur cross-links present. Melamine → Type of cross-links or network polymers.
Which of the following has cross-linked polymer chains ?
(a) bakelite (b) polyester (c) PVC (d) nylon