Dynamic mechanical properties of binary blends of different polyethylenes. II. Isothermal treatment

Authors

  • Jose A. Gonzalez Orozco,

    1. Grupo de Nuevos Materiales, Departmento de Quimica-Fisica, Facultad de Ciencias, Universidad del Pais Vasco, Campus de Lejona, Apartado 644, Bilbao, Spain
    Current affiliation:
    1. Dept. of Physics, University of Leeds, Leeds L52 9JT, England
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  • Jose M. Rego,

    1. Grupo de Nuevos Materiales, Departmento de Quimica-Fisica, Facultad de Ciencias, Universidad del Pais Vasco, Campus de Lejona, Apartado 644, Bilbao, Spain
    Current affiliation:
    1. Dept. of Chemistry and Applied Chemistry, University of Salford, Salford M5 4WT, England
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  • Issa Katime

    Corresponding author
    1. Grupo de Nuevos Materiales, Departmento de Quimica-Fisica, Facultad de Ciencias, Universidad del Pais Vasco, Campus de Lejona, Apartado 644, Bilbao, Spain
    • Avda. Basagoiti, 8, 1G 48990 Guecho, Algorta, Vizcaya, Spain
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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 as a function of crystallization temperature, Tc, and content of branched polyethylene (BPE). The influence of composition on the dynamic mechanical spectrum of the HDPE has been rationalized taking into account the dilution with increasing content of BPE of those crystals formed during the isothermal crystallization. The influence of the type of second constituent (HDPE, LLDPE or LDPE) on the relaxation process of the HDPE has been explained in terms of segregation material data.

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