Detail publikace
Vliv morfologie na deformační chování PE kopolymerů
VESELÝ, P. FIEDLER, L. NEZBEDOVÁ, E. VLACH, B.
Český název
Vliv morfologie na deformační chování PE kopolymerů
Anglický název
The effects of morphology on the yield behaviour of polyethylene copolymers.
Typ
článek v časopise - ostatní, Jost
Jazyk
en
Originální abstrakt
Semi-crystalline polymers such as polyethylene typically display necking behaviour and a yield point in tensile stress/strain curves. Yield points are always associated with a deformation mechanism which absorbs energy. For semi-crystalline polymers this mechanism involves orientation and destruction of micron to colloidal scale semi-crystalline morphologies. We utilized this result to study the deformation behaviour of several PE types which differed in the SCB and molecular weight. The standard tensile test was used for estimation the yield stress and yield strain of the materials in the study. WAXS technique was applied to observe the re-orientation of lamellae structure as a consequence of changes in deformation rate.
Český abstrakt
Semikrystalické polymery jako i PE vykazují deformační chování doprovázané dloužením během deformace. Tento proces je spojený s absorbcí mechanické energie, která je také spotřebována na reorintaci a přeskupování lamel. Toto chování bylo sledováno jednak na makroskopické úrovni-tahová zkouška a jednak pomocí techniky WAXS.
Anglický abstrakt
Semi-crystalline polymers such as polyethylene typically display necking behaviour and a yield point in tensile stress/strain curves. Yield points are always associated with a deformation mechanism which absorbs energy. For semi-crystalline polymers this mechanism involves orientation and destruction of micron to colloidal scale semi-crystalline morphologies. We utilized this result to study the deformation behaviour of several PE types which differed in the SCB and molecular weight. The standard tensile test was used for estimation the yield stress and yield strain of the materials in the study. WAXS technique was applied to observe the re-orientation of lamellae structure as a consequence of changes in deformation rate.
Klíčová slova anglicky
Polyethylene, deformation behaviour, WAXS
Rok RIV
2005
Vydáno
22.09.2005
ISSN
0009-2770
Časopis
Chemické listy (IF = 0.348)
Ročník
2005
Číslo
99
Počet stran
3
BIBTEX
@article{BUT45243,
author="Petr {Veselý} and Lubomír {Fiedler} and Eva {Nezbedová} and Bohumil {Vlach},
title="The effects of morphology on the yield behaviour of polyethylene copolymers.",
journal="Chemické listy (IF = 0.348)",
year="2005",
volume="2005",
number="99",
month="September",
issn="0009-2770"
}