Influence of Branching Density in Ethylene-Octene Copolymers on Electron Beam Crosslinkability

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28110%2F15%3A43873739" target="_blank" >RIV/70883521:28110/15:43873739 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Influence of Branching Density in Ethylene-Octene Copolymers on Electron Beam Crosslinkability

Popis výsledku v původním jazyce

Two ethylene-octene copolymers (EOC) with the same melt flow index (MFI = 3 g/10 min) but different octene contents, being 20 and 35 wt % (EOC-20 and EOC-35), were compared with regard to sensitivity to electron beam crosslinking. Dynamic mechanical analysis (DMA) revealed a large influence of the octene content on the storage modulus and the glass transition temperature (T-g) but a smaller influence of irradiation on the properties below melting point (T-m). Rheology at 150 degrees C pointed out largedifferences in samples crosslinked in the 0-60 kGy range and at lower frequencies (0.1-1 Hz). The loss factor tan confirmed that before irradiation the two copolymers were very similar, while after irradiation to 120 kGy, the EOC-35 had considerably lower tan than EOC-20, which corresponds to a better elasticity (or a higher level of crosslinking). A high-temperature creep test showed a considerably lower creep for EOC with a higher octene content. An analysis of the insoluble gel conten

Název v anglickém jazyce

Influence of Branching Density in Ethylene-Octene Copolymers on Electron Beam Crosslinkability

Popis výsledku anglicky

Two ethylene-octene copolymers (EOC) with the same melt flow index (MFI = 3 g/10 min) but different octene contents, being 20 and 35 wt % (EOC-20 and EOC-35), were compared with regard to sensitivity to electron beam crosslinking. Dynamic mechanical analysis (DMA) revealed a large influence of the octene content on the storage modulus and the glass transition temperature (T-g) but a smaller influence of irradiation on the properties below melting point (T-m). Rheology at 150 degrees C pointed out largedifferences in samples crosslinked in the 0-60 kGy range and at lower frequencies (0.1-1 Hz). The loss factor tan confirmed that before irradiation the two copolymers were very similar, while after irradiation to 120 kGy, the EOC-35 had considerably lower tan than EOC-20, which corresponds to a better elasticity (or a higher level of crosslinking). A high-temperature creep test showed a considerably lower creep for EOC with a higher octene content. An analysis of the insoluble gel conten

Druh

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

CEP obor

CD - Makromolekulární chemie

OECD FORD obor

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Projekt

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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

Polymers

ISSN

2073-4360

e-ISSN

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Svazek periodika

7

Číslo periodika v rámci svazku

12

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

13

Strana od-do

2522-2534

Kód UT WoS článku

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EID výsledku v databázi Scopus

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