Avtor/Urednik		Strauch, V; Schara, M
Naslov		E.p.r. study of the orientation of polymer segments induced by cold drawing of a low density polyethylene
Tip		članek
Vir		Polymer
Vol. in št.		Letnik 36, št. 18
Leto izdaje		1995
Obseg		str. 3435-8
Jezik		eng
Abstrakt		The orientation of low desity polyethylene (LDPE) chain segments induced by cold drawing was determined by electron paramagnetic resonance spectra measured for samples probed by tempyl stearate or alkyl radicals formed by gama-irradiation. We characterized the induced orientation in the amorphous phase using a two-a=dimensional Gassian distribution function (delta = 12 degrees), axially symmetrical about the draw direction. A simultaneously induced alignment of the crystallite c-axes with the draw direction, accompanied by a random orientation of the crystallite a-aaxes and b-axes, was also observed. We proposethat the molecular morphology of cold-drawn LDPE can be described in terms of specifically oriented crystallites emanating chain segments packed in the condis state.
Deskriptorji		POLYETHYLENES CRYSTALLOGRAPHY ELECTRON SPIN RESONANCE SPECTROSCOPY MODELS, MOLECULAR TEMPERATURE