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Dynamic mechanical properties of low‐density and linear low‐density polyethylenes. Influence of molecular segregation
Author(s) -
Orozco J. A. Gonzalez,
Rego J. M.,
Katime Issa
Publication year - 1990
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1990.070401132
Subject(s) - crystallization , materials science , relaxation (psychology) , isothermal process , linear low density polyethylene , thickening , dynamic mechanical analysis , composite material , thermodynamics , polymer chemistry , polyethylene , polymer , polymer science , physics , psychology , social psychology
The dynamic mechanical properties of different low‐density and linear low‐density polyethylenes have been measured as a function of crystallization conditions. The mechanical results have been explained accounting for molecular segregation as well as reorganization capacity of the crystallizable segments during isothermal thickening. The presence of a high amount of segregated material does not allow detection of any relationship between crystallization conditions and mechanical relaxations for three of the four samples. The average values of the resonance relaxation temperatures and the relaxation strengths are dependent on branch content and branch type.