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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 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Nucleation of polypropylene with gold nanoparticles. Part 1: Introduction of sandwich method for evaluation of very weak nucleation activity Tvůrce(i) 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)Zdroj.dok. Journal of Macromolecular Science - Physics - ISSN 0022-2348
Roč. 49, č. 2 (2010), s. 392-404Poč.str. 13 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova gold nanoparticles ; isotactic polypropylene nucleation ; transcrystallization Vědní obor RIV EB - Genetika a molekulární biologie CEP KAN200520704 GA AV ČR - Akademie věd CEZ AV0Z40500505 - UMCH-V (2005-2011) UT WOS 000276098900016 DOI 10.1080/00222340903546812 Anotace 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. Pracoviště Ústav makromolekulární chemie Kontakt Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Rok sběru 2011
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