AbstractThe influence of MT black concentration on the shear modulus of low‐density crosslinked polyethylene can be approximated by the Guth–Gold equation, at temperatures below the crystalline melting zone. Above the melting zone shear modulus does not depend practically on the carbon black level. At high temperatures both degradation and crosslinking reactions are taking place. The variation of the shear modulus with temperature due to these reactions is shown for various carbon black loadings. A preliminary chemical stress‐relaxation study at 250°C is pre
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