Which of the following polymers are composed of extended, rod-shaped and rigid molecules and in the liquid condition the molecules can become aligned in highly ordered configurations?
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A.
Foams
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B.
Thermoplastic Elastomers
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C.
Ultrahigh Molecular Weight Polyethylene
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D.
Liquid Crystal Polymers
Correct Answer:
D. Liquid Crystal Polymers
Explanation:
Liquid crystal polymers are characterized by their stiff, rod-like molecular structures. Unlike flexible polymers that form tangled coils, these rigid molecules maintain a high degree of order even in a liquid state. When melted or dissolved, they align into organized configurations, which allows them to retain some structural properties typically found in solids while remaining fluid enough for processing. This unique alignment results in materials with exceptional mechanical strength and thermal stability.
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