Resumo

COSTA, Helson Moreira da; ANDRADE, Mônica Calixto de; LESSA, Milena Diniz  e  RAMOS, Valéria Dutra. Non-isothermal crystallization kinetics of high-density polyethylene (HDPE) scraps. Polímeros [online]. 2014, vol.24, n.4, pp.521-528. ISSN 0104-1428.  http://dx.doi.org/10.1590/0104-1428.1600.

In this study, miscellaneous uncolored and colored post-consumption high-density polyethylene (HDPE) scraps were characterized by melt flow index and differential scanning calorimetry (DSC). Avrami equation modified by Jeziorny, Kissenger and Friedman methods were employed to describe the non-isothermal crystallization kinetics of the samples. The colorants present in HDPE have different nucleating abilities during the crystallization process, as well as different effects upon the crystallization rate and the activation energy for the transport of macromolecular segments to the growing crystal surface.

Palavras-chave : High-density polyethylene; thermal analysis; kinetics; crystallization.

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