Abstract
The tensile drawing behaviour and the dynamic mechanical properties of four ethylene-1-butene copolymers, with nearly the same comonomer content but obtained with slightly different catalyst systems, have been analysed. It was found that the large strain mechanical properties and the strain-hardening behaviour seem to be affected by the degree of homogeneity in the distribution of comonomer along the different chains, reflecting the differences in the catalyst systems used. However, a parallel trend was not so clear for the small-strain dynamic mechanical properties for a particular thermal history, although the dependence of the relaxations on the crystallization conditions is evident.
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P. Saavedra PhD Thesis, Universidad Complutense de Madrid (1988).
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Benavente, R., Pereña, J.M., Bello, A. et al. Influence of chemical composition distribution and thermal history on the mechanical properties and viscoelastic relaxations of ethylene-1-butene copolymers. J Mater Sci 25, 4162–4168 (1990). https://doi.org/10.1007/BF00582498
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DOI: https://doi.org/10.1007/BF00582498