Isothermal crystallization in polypropylene/ethylene?octene copolymer blends

Result code in 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>

Alternative codes found

RIV/70883521:28110/11:43867026 RIV/70883521:28150/11:43867026

Result on the web

<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>

Result language

angličtina

Original language name

Isothermal crystallization in polypropylene/ethylene?octene copolymer blends

Original language description

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 (

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

CD - Macromolecular chemistry

OECD FORD branch

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Project

<a href="/en/project/ED2.1.00%2F03.0111" target="_blank" >ED2.1.00/03.0111: Centre of Polymer Systems</a><br>

Continuities

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

Publication year

2011

Confidentiality

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

Name of the periodical

Materials Chemistry and Physics

ISSN

0254-0584

e-ISSN

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Volume of the periodical

131

Issue of the periodical within the volume

1

Country of publishing house

CH - SWITZERLAND

Number of pages

10

Pages from-to

84-93

UT code for WoS article

000298764800017

EID of the result in the Scopus database

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