The unique behavior of superheated melting kinetics of polymer crystals has been examined in terms of the metastable nature of thin polymer crystals with chain folding. The superheated melting kinetics was characterized by the heating rate dependence of the melting peak in the thermogram. By examining the behaviors of polyethylene molar mass fractions, its homologue, hexacontane, and indium, it has been experimentally confirmed that the metastability of crystals with chain folding has an essential role in the superheated melting kinetics; i.e., stable extended-chain crystals of hexacontane melts in the same way as indium without superheating, and metastable chain-folded crystals of higher molar mass polyethylene needs to overcome a larger kinetic barrier for melting.

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亚稳链折叠聚合物晶体的过热熔融动力学

根据具有链折叠的薄聚合物晶体的亚稳态性质，已经检验了聚合物晶体的过热熔融动力学的独特行为。过热熔化动力学的特征在于热谱图中熔化峰的加热速率依赖性。通过检查聚乙烯的摩尔质量分数，其同系物，十六烷和铟的行为，已通过实验证实，具有链折叠的晶体的亚稳性在过热熔融动力学中起着至关重要的作用。也就是说，稳定的六of烷延长链晶体以与铟相同的方式熔化而不发生过热，而摩尔质量更高的聚乙烯的亚稳链折叠晶体需要克服更大的熔化动力学障碍。