Joint effects of long-chain branching and specific nucleation on morphology and thermal properties of polypropylene blends

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28110%2F20%3A63526151" target="_blank" >RIV/70883521:28110/20:63526151 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.expresspolymlett.com/letolt.php?file=EPL-0010572&mi=c" target="_blank" >https://www.expresspolymlett.com/letolt.php?file=EPL-0010572&mi=c</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3144/expresspolymlett.2020.77" target="_blank" >10.3144/expresspolymlett.2020.77</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Joint effects of long-chain branching and specific nucleation on morphology and thermal properties of polypropylene blends

Popis výsledku v původním jazyce

The influence of long-chain branching and specific β-nucleation on polymorphic composition, melting and crystallization, and morphology of polypropylene blends were investigated by wide-angle X-ray scattering, differential scanning calorimetry, and scanning electron microscopy. Linear polypropylene and long-chain branched polypropylene were used for the preparation of blends in various proportions. N,N′-dicyclohexylnaphthalene-2,6-dicarboxamide was introduced (0 or 0.03 wt%) as a β-specific nucleating agent into prepared blends. It was found that LCB-PP strongly induces γ-phase formation in the blends and suppresses the nucleation activity of a β-specific nucleating agent. Blends containing a predominant amount of α-and γ-phases showed higher thermodynamic stability within melting, as compared to the samples rich in β-phase. During crystallization, LCB-PP in the blends increases nucleation density by self-seeding effect, manifesting itself in the shift of crystallization temperature. β-phase in the blends is distinctly separated in spherulites, while α-and γ-phases coexist on the lamellae level.

Název v anglickém jazyce

Joint effects of long-chain branching and specific nucleation on morphology and thermal properties of polypropylene blends

Popis výsledku anglicky

The influence of long-chain branching and specific β-nucleation on polymorphic composition, melting and crystallization, and morphology of polypropylene blends were investigated by wide-angle X-ray scattering, differential scanning calorimetry, and scanning electron microscopy. Linear polypropylene and long-chain branched polypropylene were used for the preparation of blends in various proportions. N,N′-dicyclohexylnaphthalene-2,6-dicarboxamide was introduced (0 or 0.03 wt%) as a β-specific nucleating agent into prepared blends. It was found that LCB-PP strongly induces γ-phase formation in the blends and suppresses the nucleation activity of a β-specific nucleating agent. Blends containing a predominant amount of α-and γ-phases showed higher thermodynamic stability within melting, as compared to the samples rich in β-phase. During crystallization, LCB-PP in the blends increases nucleation density by self-seeding effect, manifesting itself in the shift of crystallization temperature. β-phase in the blends is distinctly separated in spherulites, while α-and γ-phases coexist on the lamellae level.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10404 - Polymer science

Projekt

<a href="/cs/project/EF16_027%2F0008464" target="_blank" >EF16_027/0008464: Mezinárodní mobilita výzkumných pracovníků UTB ve Zlíně</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název periodika

Express Polymer Letters

ISSN

1788-618X

e-ISSN

—

Svazek periodika

14

Číslo periodika v rámci svazku

10

Stát vydavatele periodika

HU - Maďarsko

Počet stran výsledku

10

Strana od-do

952-961

Kód UT WoS článku

000566773200005

EID výsledku v databázi Scopus

2-s2.0-85088902742