Nucleation of Polypropylene Crystallization with Gold Nanoparticles. Part 2: Relation between Particle Morphology and Nucleation Activity
| Autor: | Miroslav Šlouf, Ewa Piorkowska, Taťana Vacková, Alexander Zhigunov, Antonín Sikora |
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| Rok vydání: | 2016 |
| Předmět: |
Polarized light microscopy
Materials science Nanostructure Polymers and Plastics Nucleation Nanoparticle 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences law.invention Crystallography Differential scanning calorimetry Chemical engineering Colloidal gold law Materials Chemistry Particle Crystallization 0210 nano-technology |
| Zdroj: | Journal of Macromolecular Science, Part B. 55:393-410 |
| ISSN: | 1525-609X 0022-2348 |
| DOI: | 10.1080/00222348.2016.1153402 |
| Popis: | The influence of gold nanoparticle morphology on nucleation of isotactic polypropylene (PP) crystallization was investigated. Previous experiments indicated certain nucleation activity of gold nanoparticles, varying with their size. In this work, eight types of gold micro/nanoparticles were used: vacuum-sputtered nanostructures (nanoparticles, nanoislands, and nanolayers), chemically prepared isometric gold nanocrystals (5, 20, and 100 nm diameters), and two types of gold microcrystals with well-developed crystal facets [with (100) and (111) facets, respectively]. To minimize the effect of particle agglomeration, we used our recently introduced sandwich method, in which the nucleating agent was deposited between thin PP films and the nucleation was evaluated by polarized light microscopy (PLM), X-ray scattering (WAXS), and differential scanning calorimetry (DSC). The nucleation activity of Au particles in PP was lower than it might be expected from the previous studies and depended on their morpho... |
| Databáze: | OpenAIRE |
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