Question

Which of the following has cross-linked polymer chains?
A. bakelite
B. polyester
C. PVC
D. nylon

Answer 1

Answer:

A. Bakelite.

Explanation:

Bakelite is a Thermosetting plastic which have a permanent shape and size that cannot be changed from heat and pressure without breaking it due to its cross-linked polymers.

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Answer 2

A. bakelite

Explanation:

Thermosetting Plastics are prepared from low molecular mass semi-fluid substances. When heated in a mould, they get highly cross-linked to form hard infusible and insoluble products. Thermosetting plastics can withstand very high temperatures. During its curing process, the polymers link together to form a permanent chemical bond. They are poor conductors of heat and electricity and hence used in electric switches, sockets, plus, frying pan handles, etc.

Bakelite is a thermosetting plastic.

Option A is the answer.