Question detail
Explain why thermosetting polymers do not soften when heated, using their structure in your answer.
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
Using materials
Question
Explain why thermosetting polymers do not soften when heated, using their structure in your answer.
Answer
Thermosetting polymers do not soften when heated because their polymer chains are joined by cross-links. These cross-links hold the structure in a fixed network, unlike thermosoftening polymers where chains can slide past each other when heated.
Explanation
This answer is correct because it links the behaviour of a thermosetting polymer to its cross-linked structure. The key distinction is structural: thermosetting polymers have cross-links, while thermosoftening polymers have chains that can move when heated.
Common mistake
Confusing Polymer Types
Students often confuse thermosoftening and thermosetting polymers, thinking they behave the same when heated.
Remember that thermosoftening polymers can be reshaped when heated, while thermosetting polymers maintain their shape and do not melt upon reheating.
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