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Nucleation of polypropylene with gold nanoparticles. Part 1: Introduction of sandwich method for evaluation of very weak nucleation activity
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SYSNO ASEP 0342351 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Nucleation of polypropylene with gold nanoparticles. Part 1: Introduction of sandwich method for evaluation of very weak nucleation activity Author(s) Pavlova, Ewa (UMCH-V) RID
Šlouf, Miroslav (UMCH-V) RID, ORCID
Šandová, Hana (UMCH-V)
Baldrian, Josef (UMCH-V)
Sikora, Antonín (UMCH-V) RID
Lednický, František (UMCH-V)
Masirek, R. (PL)
Piorkowska, E. (PL)Source Title Journal of Macromolecular Science - Physics - ISSN 0022-2348
Roč. 49, č. 2 (2010), s. 392-404Number of pages 13 s. Language eng - English Country US - United States Keywords gold nanoparticles ; isotactic polypropylene nucleation ; transcrystallization Subject RIV EB - Genetics ; Molecular Biology R&D Projects KAN200520704 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) CEZ AV0Z40500505 - UMCH-V (2005-2011) UT WOS 000276098900016 DOI 10.1080/00222340903546812 Annotation Although gold particles are known to nucleate isotactic polypropylene (PP), the nucleating effect of chemically pure 5 nm Au, prepared in vacuum sputter coater, was found to be hardly observable. In order to detect such a weak effect, we deposited a homogeneous layer of Au nanoparticles between thin PP films and evaluated the nucleation activity by a combination of three independent methods: polarized light microscopy (PLM), differential scanning calorimetry (DSC), and 2D wide-angle X-ray scattering (2D-WAXS). This new technique, which was called sandwich method, allowed us to demonstrate that gold nanoparticles were able to nucleate PP crystallization, although the effect was much weaker than that produced by commercial .alpha.-nucleant [1,2,3,4-bis(3,4-dimethylbenzylidene)sorbitol] and .beta.-nucleant (N,N-Dicyclohexyl-2,6-naphthalene dicarboxamide). The sandwich method appeared to be quite universal and applicable for any micro-sized nucleants or nanonucleants. Workplace Institute of Macromolecular Chemistry Contact Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Year of Publishing 2011
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