Weekly topic: 5 Wealth points for correct answers, 2 Wealth points for participation； Question 231
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Judgment: The glass transition temperature is the transition temperature corresponding to the \"freezing\" or \"thawing\" of the movement of polymer chain segments. ( ) —————————————————— Please note: We will close this thread after 24 hours, and at that time we will announce the best reply (the best assistance), as well as the answer and explanation. Attraction Reward: If you post a topic in this section within two days to provide a detailed explanation or discussion of the knowledge points related to this question, please reply or leave a comment in this post to inform us, and we will have a moderator award you + Attraction. It is not allowed to simply copy and paste; original content is preferred, with at least some organization by the user along with personal insights.
The glass transition temperature is the temperature at which the movement of polymer chain segments is \"frozen\" or \"thawed\"; this temperature is known as the glass transition temperature. (Yes) The temperature at which a polymer transitions from the elastomeric state to the glassy state is the temperature at which amorphous polymers (including the amorphous portions in crystalline polymers) change from the glassy state to the elastomeric state, or vice versa. It represents the lowest temperature at which the macromolecular chains of amorphous polymers can move freely; this value is usually denoted as Tg, and it may vary depending on the methods and conditions used for measurement. An important process parameter for polymers. Above this temperature, the polymer exhibits elasticity ； Below this temperature, polymers exhibit brittleness, which must be taken into account when using them as plastics, rubbers, synthetic fibers, etc. For example, the glass transition temperature of polyvinyl chloride is 80°C. However, he is not the upper limit for the working temperature of the product. For example, the operating temperature of rubber must be above its glass transition temperature; otherwise, it loses its high elasticity.
The glass transition temperature is the temperature at which the movement of polymer chain segments is \"frozen\" or \"thawed\"; this temperature is known as the glass transition temperature. (Yes)
The glass transition temperature is the temperature at which the movement of polymer chain segments is \"frozen\" or \"thawed\"; this temperature is known as the glass transition temperature. ( √
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The glass transition temperature is the temperature at which the movement of polymer chain segments is \"frozen\" or \"thawed\"; this temperature is known as the glass transition temperature. ( Wrong )
The glass transition temperature is the temperature at which the movement of polymer chain segments is \"frozen\" or \"thawed\"; this temperature is known as the glass transition temperature. (V)
The glass transition temperature is the temperature at which the movement of polymer chain segments is \"frozen\" or \"thawed\"; this temperature is known as the glass transition temperature. ( √ )
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