Stress relaxation after a step strain in uniaxial extension of polyisobutylene and polyethylene

The morphology of molten polymeric materials is known to be less sensitive to shear than to extensional deformations. However, it is not easy to characterise molten polymeric materials in simple extensional flows due to the large number of experimental difficulties involved. This has led to the effe...

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Veröffentlicht in:	Rheologica acta 2003-07, Vol.42 (4), p.345-354
Hauptverfasser:	BARROSO, Vitor C, RIBEIRO, Sandra P, MAIA, Joao M
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Chain branching Deformation Exact sciences and technology Experiments Low density polyethylenes Melts Molecular structure Molecular weight Molecular weight distribution Morphology Organic polymers Physicochemistry of polymers Polyisobutylene Properties and characterization Rheology and viscoelasticity Shear Strain Stress relaxation
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