Detail publikace

The Effects of Morphology on the Yield Behaviour of Polyethylene Copolymers

VESELÝ, Petr VLACH, Bohumil NEZBEDOVÁ, Eva FIEDLER, Lubomír

Anglický název

The Effects of Morphology on the Yield Behaviour of Polyethylene Copolymers

Typ

Stať ve sborníku v databázi WoS či Scopus

Jazyk

en

Originální abstrakt

Several polyethylene copolymers from Czech production (which differed in the number of short change branches – SCB and molecular weight) were compared with two reference types of polyethylene copolymers from foreign production. Standard tensile specimens were prepared and the tensile test under different deformation speed (50, 5, 0.5 mm/min) and above glass transition temperature (Tg) was carried out. The results have shown changes in tensile yield stress in dependence on deformation speed and type of polyethylene copolymer. All materials types have shown non-linear behaviour above glass transition temperature. The WAXS analysis (wide-angle X-scattering) detected that, when the deformation speed was low, the macroscopic yield stress was affected from the re-orientation of crystalline lamellae. These facts could be also observed on the profile of the neck. The shape of the neck can tell us about heterogeneity of individual material types.

Klíčová slova anglicky

Polyethylene, Deformation behaviour

Vydáno

2005-09-20

Místo

FSI VUT BRNO

ISBN

80-214-2984-4

Kniha

Sborník konference

Strany od–do

263–266

Počet stran

4

BIBTEX


@inproceedings{BUT16593,
  author="Petr {Veselý} and Lubomír {Fiedler} and Eva {Nezbedová} and Bohumil {Vlach}",
  title="The Effects of Morphology on the Yield Behaviour of Polyethylene Copolymers",
  booktitle="Sborník konference",
  year="2005",
  pages="263--266",
  address="FSI VUT BRNO",
  isbn="80-214-2984-4"
}