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从熔体淬火得到的聚对苯二甲酸乙二醇酯(PET)薄片在室温下呈非晶玻璃态,已经证明这是一种非平衡态。很多文献曾报道,在T_g以下对它进行退火处理后虽然观察不到明显的结晶,但是它的延伸性能及抗冲性能会迅速变坏。不少文献的实验表明这退火过程是试样的分子链从非平衡态转变到更
Polyethylene terephthalate (PET) flakes obtained from melt quenching are amorphous in glass at room temperature and have been shown to be non-equilibrium. It has been reported in many papers that no significant crystallization is observed after T_g annealing, but its extensibility and impact resistance deteriorate rapidly. The experiment of many documents shows that the annealing process is the transformation of the molecular chain of the sample from non-equilibrium to more