Bakelite, made from phenol and methanal, is used for electrical switches. Which property explains why it does not soften on heating?
Correct answer B. It is a thermosetting polymer with extensive cross-linking
Explanation
Bakelite forms a rigid three-dimensional network of covalent cross-links between phenol rings through –CH₂– bridges. Heating cannot make the chains slide past each other, so it does not melt and instead chars at high temperature.
Answer checked How we write and check questions
Discussion