Isothermal crystallization in polypropylene/ethylene?octene copolymer blends
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28140%2F11%3A43867026" target="_blank" >RIV/70883521:28140/11:43867026 - isvavai.cz</a>
Nalezeny alternativní kódy
RIV/70883521:28110/11:43867026 RIV/70883521:28150/11:43867026
Výsledek na webu
<a href="http://dx.doi.org/10.1016/j.matchemphys.2011.07.058" target="_blank" >http://dx.doi.org/10.1016/j.matchemphys.2011.07.058</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.matchemphys.2011.07.058" target="_blank" >10.1016/j.matchemphys.2011.07.058</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Isothermal crystallization in polypropylene/ethylene?octene copolymer blends
Popis výsledku v původním jazyce
Crystallization kinetics of polypropylene (PP)/ethylene?octene copolymer (EOC) blends was measured by differential scanning calorimetry (DSC) and by optical microscopy at various temperatures (123-140°C). By DSC it was found that small amounts of EOC (10?30%) increase the bulk crystallization kinetics; in some cases even 80% increase was observed. Larger amounts of EOC (50?80%) have caused a decrease in crystallization kinetics. Optical microscopy has revealed that crystallization kinetics of a single spherulite is decreased by the presence of EOC, and at the same time there are more spherulites in the blend. EOC acts as a nucleation agent increasing the bulk crystallization rate and at the same time it acts as an obstacle to the growing front of a spherulite when the PP lamellae have to go around the EOC obstacle. This was confirmed by detailed analyses according to Avrami and Hoffman?Lauritzen. Structure was also observed by transmission electron microscopy (TEM). At low PP content (
Název v anglickém jazyce
Isothermal crystallization in polypropylene/ethylene?octene copolymer blends
Popis výsledku anglicky
Crystallization kinetics of polypropylene (PP)/ethylene?octene copolymer (EOC) blends was measured by differential scanning calorimetry (DSC) and by optical microscopy at various temperatures (123-140°C). By DSC it was found that small amounts of EOC (10?30%) increase the bulk crystallization kinetics; in some cases even 80% increase was observed. Larger amounts of EOC (50?80%) have caused a decrease in crystallization kinetics. Optical microscopy has revealed that crystallization kinetics of a single spherulite is decreased by the presence of EOC, and at the same time there are more spherulites in the blend. EOC acts as a nucleation agent increasing the bulk crystallization rate and at the same time it acts as an obstacle to the growing front of a spherulite when the PP lamellae have to go around the EOC obstacle. This was confirmed by detailed analyses according to Avrami and Hoffman?Lauritzen. Structure was also observed by transmission electron microscopy (TEM). At low PP content (
Klasifikace
Druh
J<sub>x</sub> - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
CEP obor
CD - Makromolekulární chemie
OECD FORD obor
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Návaznosti výsledku
Projekt
<a href="/cs/project/ED2.1.00%2F03.0111" target="_blank" >ED2.1.00/03.0111: Centrum polymerních systémů</a><br>
Návaznosti
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)<br>S - Specificky vyzkum na vysokych skolach
Ostatní
Rok uplatnění
2011
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
Materials Chemistry and Physics
ISSN
0254-0584
e-ISSN
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Svazek periodika
131
Číslo periodika v rámci svazku
1
Stát vydavatele periodika
CH - Švýcarská konfederace
Počet stran výsledku
10
Strana od-do
84-93
Kód UT WoS článku
000298764800017
EID výsledku v databázi Scopus
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