无规聚苯乙烯（Tg约100°C）冷却过程研究
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If polystyrene is cooled very slowly, it will eventually reach its glass transition temperature (Tg) of 100 °C. At this point, the polystyrene molecules will become rigid and brittle. This means that the polymer chains in the material will no longer be able to move freely and it will become more difficult to deform or stretch the material.
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