The effect of PVP on thermal, mechanical, and dielectric properties in PVDF-HFP/PVP thin film

Gradišar Centa, Urška (author), Mihelčič, Mohor (author), Bobnar, Vid (author), Remškar, Maja (author), Slemenik Perše, Lidija (author)

In this research, the influences of the addition of PVP to PVDF-HFP polymers and the preparation of thin films using a solvent casting method were studied. The PVDF-HFP and polymer blend PVDF-HFP/PVP thin films with a nanostructured surface were investigated using scanning electron microscopy, differential scanning calorimetry, nanoindentation, and dielectric spectroscopy. The results showed that the PVP formed a dispersed phase (the poorer conductive islands) in the PVDF-HFP polymer matrix, which reduced its mechanical properties. The crystallinity of PVDF-HFP polymer decreased with the addition of PVP by 7.4%, but the PVP induced the formation of the polar β-phase of PVDF-HFP. Therefore, an improved dielectric response is expected, but it was not significantly improved even though the polar β-phase was detected. The contrasting effect was attributed to less conductive PVP islands on the surface of the PVDF-HFP/PVP polymer blend, which decreased its conductivity.

• Language: English
• Keywords: polymer blend, mechanical properties, crystallization
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Version of Record
• Publication date: 25.08.2022
• Year: 2022
• Number of pages: 10 str.
• Numbering: Vol. 12, iss. 9, art. 1241
• PID: 20.500.12556/RUL-139058
• UDC: 678:531
• ISSN on article: 2079-6412
• DOI: 10.3390/coatings12091241
• COBISS.SI-ID: 119477507
• Publication date in RUL: 29.08.2022

Record is a part of a journal

• Title: Coatings
• Shortened title: Coatings
• Publisher: MDPI AG
• ISSN: 2079-6412
• COBISS.SI-ID: 523035673

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
• Licensing start date: 25.08.2022

Secondary language

• Language: Slovenian
• Keywords: polimerna mešanica, mehanske lastnosti, kristalizacija