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Question & Answer
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A polymer with high molecular weight and a high degree of cross-linking, designed for implant applications, requiring higher processing temperatures.
A low-density polymer with rapid cooling during processing, resulting in a Tg below room temperature, suitable for packaging.
A polymer with low molecular weight and high crystallinity, processed at low temperatures to maintain flexibility for automotive parts.
A polymer with a high Tg that is blended with a plasticizer to lower its Tg for easier processing in consumer goods.
Understanding the Answer
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When the polymer chain is long and many chains are linked together, the material behaves more rigidly. Other options are incorrect because Cooling quickly does not change Tg; Tg is set by the polymer’s makeup; A short chain lowers Tg, while crystals make the material more solid and increase 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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