Dynamic mechanical properties of binary blends of different polyethylenes. I. Nonisothermal treatment

Authors

  • Jose A. Gonzalez Orozco,

    1. Grupo de Nuevos Materiales, Departamento de Quimica-Fisica, Facultad de Ciencias, Universidad del Pais Vasco, Apartado 644, Bilbao, Spain
    Current affiliation:
    1. Dept. of Physics, University of Leeds, Leeds L52 9JT, England
    Search for more papers by this author
  • Jose M. Rego,

    1. Grupo de Nuevos Materiales, Departamento de Quimica-Fisica, Facultad de Ciencias, Universidad del Pais Vasco, Apartado 644, Bilbao, Spain
    Current affiliation:
    1. Dept. Chemistry and Applied Chemistry, University of Salford, Salford M5 4WT, England
    Search for more papers by this author
  • Issa Katime

    Corresponding author
    1. Grupo de Nuevos Materiales, Departamento de Quimica-Fisica, Facultad de Ciencias, Universidad del Pais Vasco, Apartado 644, Bilbao, Spain
    • Avda. Basagoiti, 8, 1 C, 48990 Guecho, Algorta, Vizcaya, Spain
    Search for more papers by this author

Abstract

The relaxation processes and thermal properties of a series of blends of a highly linear high-density polyethylene (HDPE) with several branched high-density, linear low-density (LLDPE) and low-density polyethylenes (LDPE) have been measured. For the sake of comparison, all the samples were subjected to the same thermal treatment, that is, a rapid quenching from the molten state. The mechanical properties have been analyzed, taking into consideration the crystallization behavior of each sample. The existance of cocrystallization provides a bigger change in the dynamic mechanical properties than when segregation takes place. The observed changes in the end-corrected storage modulus supports this conclusion as well as those associated with the α, β, and γ relaxation temperatures.

Ancillary