The polymorphic composition of long-chain branched polypropylene processed by injection and compression molding

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28110%2F23%3A63569418" target="_blank" >RIV/70883521:28110/23:63569418 - isvavai.cz</a>

Result on the web

<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.2023.77" target="_blank" >10.3144/expresspolymlett.2023.77</a>

Result language

angličtina

Original language name

The polymorphic composition of long-chain branched polypropylene processed by injection and compression molding

Original language description

The impact of injection molding processing parameters, including mold temperature, injection speed, and holding pressure, on the supermolecular structure of long-chain branched polypropylene (LCB-PP) was investigated. Commercial LCB-PP was processed under different conditions, with four sets of processing parameters applied. Holding pressure was varied from 30–70 MPa by 10 MPa in the P-SET, mold temperature was raised from 40 to 120 °C in 20 °C steps in the T-SET, and injection speed increased from 20 to 140 mm/s in 30 mm/s steps in S-SET1 and S-SET2, with mold temperatures at 40 or 120 °C. The polymorphic composition of the specimens was analyzed using wide-angle X-ray scattering, demonstrating a strong dependence on the processing parameters. The skin of the specimens showed an increase in β-phase content with higher mold temperature and injection speed. Conversely, growing holding pressure slightly suppressed β-phase content and promoted the formation of the γ-phase, which was predominantly manifested in the core of the specimens. The polymorphic composition, with both β-and γ-phases present in notable amounts, had a beneficial effect on the impact strength of the specimens.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10404 - Polymer science

Project

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Continuities

V - Vyzkumna aktivita podporovana z jinych verejnych zdroju

Publication year

2023

Confidentiality

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

Name of the periodical

Express Polymer Letters

ISSN

1788-618X

e-ISSN

—

Volume of the periodical

17

Issue of the periodical within the volume

10

Country of publishing house

HU - HUNGARY

Number of pages

11

Pages from-to

1031-1041

UT code for WoS article

001062444200005

EID of the result in the Scopus database

2-s2.0-85167413799