On isotactic polypropylene annealing: Difference in final properties of neat and β-nucleated polypropylene

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28110%2F22%3A63552298" target="_blank" >RIV/70883521:28110/22:63552298 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.expresspolymlett.com/search.php" target="_blank" >http://www.expresspolymlett.com/search.php</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3144/expresspolymlett.2022.34" target="_blank" >10.3144/expresspolymlett.2022.34</a>

Jazyk výsledku

angličtina

Název v původním jazyce

On isotactic polypropylene annealing: Difference in final properties of neat and β-nucleated polypropylene

Popis výsledku v původním jazyce

The effect of isotactic polypropylene (iPP) molecular weight and thermal treatment on final crystalline structure and mechanical properties were investigated by X-ray scattering, differential scanning calorimetry, tensile testing, and scanning electron microscopy. Neat and β-nucleated isotactic polypropylene were subjected to annealing above melting temperature of β-phase but still below melting temperature of α-phase, which caused both improvement of α crystallites and β to α-recrystallization, in case of nucleated material. As a consequence, the final mechanical properties like tensile strength and stiffness improved significantly. The increase is much more pronounced in the case of β to α-transformed materials with lower molecular weight. This phenomenon can also be attributed to the partial preservation of the specific structure of the amorphous phase present in β-nucleated polypropylene, in addition to the perfection of the crystalline phase. The amorphous phase comprises many interconnecting chains passing through several lamellae whereby providing a long-range effect.

Název v anglickém jazyce

On isotactic polypropylene annealing: Difference in final properties of neat and β-nucleated polypropylene

Popis výsledku anglicky

The effect of isotactic polypropylene (iPP) molecular weight and thermal treatment on final crystalline structure and mechanical properties were investigated by X-ray scattering, differential scanning calorimetry, tensile testing, and scanning electron microscopy. Neat and β-nucleated isotactic polypropylene were subjected to annealing above melting temperature of β-phase but still below melting temperature of α-phase, which caused both improvement of α crystallites and β to α-recrystallization, in case of nucleated material. As a consequence, the final mechanical properties like tensile strength and stiffness improved significantly. The increase is much more pronounced in the case of β to α-transformed materials with lower molecular weight. This phenomenon can also be attributed to the partial preservation of the specific structure of the amorphous phase present in β-nucleated polypropylene, in addition to the perfection of the crystalline phase. The amorphous phase comprises many interconnecting chains passing through several lamellae whereby providing a long-range effect.

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

2022

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

16

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

HU - Maďarsko

Počet stran výsledku

12

Strana od-do

453-464

Kód UT WoS článku

000766639800002

EID výsledku v databázi Scopus

2-s2.0-85126032696