Počet záznamů: 1  

Nucleation of polypropylene with gold nanoparticles. Part 1: Introduction of sandwich method for evaluation of very weak nucleation activity

  1. 1.
    SYSNO ASEP0342351
    Druh ASEPJ - Článek v odborném periodiku
    Zařazení RIVJ - Článek v odborném periodiku
    Poddruh JČlánek ve WOS
    NázevNucleation 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. 392-404
    Poč.str.13 s.
    Jazyk dok.eng - angličtina
    Země vyd.US - Spojené státy americké
    Klíč. slovagold nanoparticles ; isotactic polypropylene nucleation ; transcrystallization
    Vědní obor RIVEB - Genetika a molekulární biologie
    CEPKAN200520704 GA AV ČR - Akademie věd
    CEZAV0Z40500505 - UMCH-V (2005-2011)
    UT WOS000276098900016
    DOI10.1080/00222340903546812
    AnotaceAlthough 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.
    PracovištěÚstav makromolekulární chemie
    KontaktEva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358
    Rok sběru2011
Počet záznamů: 1  

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