Why are thermosetting polymers difficult to recycie?A) They have low melting points.B) They undergo a cross-linking reaction that cannot be reversed.C) They dissolve easily in solventsD) They are not durable under high temperatures.
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Thermosetting polymers are a type of polymer that, once heated and cured, form a rigid, three-dimensional network through cross-linking. This cross-linking makes them highly durable and resistant to heat and chemicals. Show more…
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Which of the following are characteristics of thermosetting polymers? (A) Heavily branched cross linked polymers (B) Linear slightly branched long chain molecules (C) Become infusible on moulding so cannot be reused (D) Soften on heating and harden on cooling, can be reused
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JEE (Advanced) Exercises
Identify the correct statement(s) about thermoplastics from among the following (a) They can be remelted and remoulded many times by heating and cooling. (b) The intermolecular forces in thermoplastics are weaker than those present in elastomers. (c) There are no cross links between polymeric chain. (d) Neoprene is a thermoplastics polymer.
Make comparisons of thermoplastic and thermosetting polymers (a) on the basis of mechanical characteristics upon heating, and (b) according to possible molecular structures.
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