关键词: 高密度聚乙烯, 共混物, 聚酰胺6, 原位增容, 非等温结晶动力学, 差示扫描量热分析

Abstract: The non-isothermal crystallization kinetics of in-situ compatibilized PA6/PE-HD blends was studied by means of differential scanning calorimetry(DSC). Its non-isothermal crystallization data was analyzed using Jeziorny modified Avrami equation and Mo method. It showed that the above equation and method could well describe the nonisothermal crystallization of PA6 and PA6/PE-HD blends. At primary crystallization stage, there existed both heterogeneous and homogeneous nucleations. In the secondary crystallization stage, the growth was one-dimensional mode. The addition of PE-HD played a role of heterogeneous nucleation, which promoted the growth of the nuclei. Additionally, the relationship between the activation energy of nonisothermal crystallization of PA6/PE-HD blends and temperature was obtained from Vyazovkin method.

Key words: high-density polyethylene, blend, polyamide 6, In-situ Compatibilized, non-isothermal crystallization kinetics, differential scanning calorimetry