Free and constrained amorphous phases in polyethylene: Interpretation of 1H NMR and SAXS data over a broad range of crystallinity

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F15%3A43897970" target="_blank" >RIV/60461373:22340/15:43897970 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/49777513:23640/15:43925221

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.polymer.2014.12.036" target="_blank" >http://dx.doi.org/10.1016/j.polymer.2014.12.036</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.polymer.2014.12.036" target="_blank" >10.1016/j.polymer.2014.12.036</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Free and constrained amorphous phases in polyethylene: Interpretation of 1H NMR and SAXS data over a broad range of crystallinity

Popis výsledku v původním jazyce

Polyethylene (PE) is available in various grades ranging from high-density to very-low density (co-)polymers. The morphology of PE strongly influences its properties and is extensively studied, including the content of phases. Most studies are usually concerned only with the crystallinity and non-critically adopt the classical three-component model of PE, which considers a crystalline (rigid) and an amorphous (mobile) phase separated by an interfacial (semi-rigid) component. We provide evidence that this assignment of the semi-rigid and mobile components can be incorrect at lower PE densities. The phase composition of industrial PE samples with crystallinities from 35 to 82 wt. % was studied using low-field 1H NMR and the characteristic dimensions of the lamellar stacks were measured using small-angle X-ray scattering (SAXS). Based on our results, we propose a new interpretation of PE morphology at crystallinities below 60 wt. %, which considers the rigid crystalline phase, the constra

Název v anglickém jazyce

Free and constrained amorphous phases in polyethylene: Interpretation of 1H NMR and SAXS data over a broad range of crystallinity

Popis výsledku anglicky

Polyethylene (PE) is available in various grades ranging from high-density to very-low density (co-)polymers. The morphology of PE strongly influences its properties and is extensively studied, including the content of phases. Most studies are usually concerned only with the crystallinity and non-critically adopt the classical three-component model of PE, which considers a crystalline (rigid) and an amorphous (mobile) phase separated by an interfacial (semi-rigid) component. We provide evidence that this assignment of the semi-rigid and mobile components can be incorrect at lower PE densities. The phase composition of industrial PE samples with crystallinities from 35 to 82 wt. % was studied using low-field 1H NMR and the characteristic dimensions of the lamellar stacks were measured using small-angle X-ray scattering (SAXS). Based on our results, we propose a new interpretation of PE morphology at crystallinities below 60 wt. %, which considers the rigid crystalline phase, the constra

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CI - Průmyslová chemie a chemické inženýrství

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2015

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Polymer

ISSN

0032-3861

e-ISSN

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Svazek periodika

58

Číslo periodika v rámci svazku

NEUVEDEN

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

10

Strana od-do

189-198

Kód UT WoS článku

000349591000024

EID výsledku v databázi Scopus

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