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Question & Answer
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The polymer chains gain enough energy to overcome intermolecular forces and move freely
The polymer molecules become crystalline and rigid
The thermal energy causes the polymer to disintegrate
The polymer absorbs moisture and expands
Understanding the Answer
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When the temperature rises above Tg, the heat gives the polymer chains extra energy. Other options are incorrect because Some think polymers crystallize when they get hot, but that happens at much higher temperatures; Heat does not break the polymer into pieces at Tg.
Key Concepts
Polymer Glass Transition Temperature
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Deep Dive: Polymer Glass Transition Temperature
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Definition
Polymer Glass Transition Temperature (Tg) is the temperature at which a polymer transitions from a rigid, glassy state to a flexible, rubbery state. Understanding Tg is crucial as it determines a polymer's properties like flexibility and brittleness, impacting real-world applications such as the Challenger shuttle disaster.
Topic Definition
Polymer Glass Transition Temperature (Tg) is the temperature at which a polymer transitions from a rigid, glassy state to a flexible, rubbery state. Understanding Tg is crucial as it determines a polymer's properties like flexibility and brittleness, impacting real-world applications such as the Challenger shuttle disaster.
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