The Influence of nucleating agents and process parameters on phase structure of isotactic polypropylene and its Copolymer with 3% ethylene

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

The Influence of nucleating agents and process parameters on phase structure of isotactic polypropylene and its Copolymer with 3% ethylene

Popis výsledku v původním jazyce

The homopolymer of the isotactic polypropylene (iPP) and the random copolymer of the isotactic polypropyleneand 3% ethylene (iPPE) were used in this study. Isotactic polypropylene can be prepared in α, β and γ morphologicalphases depending on its crystallization conditions. The phase β content has a strong influence on mechanical,optical and thermal properties. The samples with nucleating agents (NA) α and β were used. Various processparameters were used to prepare melted samples: two thicknesses and three different cooling regimes. Wide-angleX-ray scattering (WAXD) and scanning electron microscopy (SEM) were used to investigate the phase structure.The results show that iPP without nucleation agents (4mm, <1oC /min) has the highest crystallinity (83.7%). Thesample of iPP with β-NA (4mm, <1oC /min) has the highest phase β (61.3%); the slower cooling regime and thehigher thickness increased the crystallinity (73.3%). iPPE with β-NA (0.4mm, 15oC /min) has the lower amount ofthe phase β (33.8%); the higher thickness and slower cooling regime decreased the amount of the phase β (7.1%)however the crystalline content of iPPE (63.7%) is increased.

Název v anglickém jazyce

The Influence of nucleating agents and process parameters on phase structure of isotactic polypropylene and its Copolymer with 3% ethylene

Popis výsledku anglicky

The homopolymer of the isotactic polypropylene (iPP) and the random copolymer of the isotactic polypropyleneand 3% ethylene (iPPE) were used in this study. Isotactic polypropylene can be prepared in α, β and γ morphologicalphases depending on its crystallization conditions. The phase β content has a strong influence on mechanical,optical and thermal properties. The samples with nucleating agents (NA) α and β were used. Various processparameters were used to prepare melted samples: two thicknesses and three different cooling regimes. Wide-angleX-ray scattering (WAXD) and scanning electron microscopy (SEM) were used to investigate the phase structure.The results show that iPP without nucleation agents (4mm, <1oC /min) has the highest crystallinity (83.7%). Thesample of iPP with β-NA (4mm, <1oC /min) has the highest phase β (61.3%); the slower cooling regime and thehigher thickness increased the crystallinity (73.3%). iPPE with β-NA (0.4mm, 15oC /min) has the lower amount ofthe phase β (33.8%); the higher thickness and slower cooling regime decreased the amount of the phase β (7.1%)however the crystalline content of iPPE (63.7%) is increased.

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

2016

Kód důvěrnosti údajů

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

Název periodika

Manufacturing Technology

ISSN

1213-2489

e-ISSN

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Svazek periodika

16

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

4

Strana od-do

103-106

Kód UT WoS článku

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EID výsledku v databázi Scopus

2-s2.0-84976466913