Project detail
Effect of nanoparticles on the chain mobility and crystalization kinetics in polyolefin nanocomposites
Duration: 01.01.2010 — 31.12.2012
Funding resources
Czech Science Foundation - Standardní projekty
- whole funder (2010-01-01 - 2012-12-31)
On the project
Description in English
The nanoparticles change both static conformational structure and lengthen the chain reptation time considerably. Model based on the reptation dynamics, proposed by the PI, is capable to predict effects of structural variables on spherulite growth rate in the presence of solid nanoparticles. It is proposed to investigate effects of adding nanoparticles on the morphogenesis of spherulitic structure and deformation response of nanocomposites with PP and PE matrices of different molecular architecture. Morphology of nanocomposites will be investigated utilizing optical and electron microscopy, differential scanning calorimetry, x-ray diffraction, hot stage and measurements of density. Mechanical behavior will be explored using dynamic-mechanical thermal spectroscopy, static tensile testing and microdeformation mechanisms will be investigated employing newly designed microtensile tester operating in the viewing field of the Confocal Laser Microscope. MD/MC simulations will be employed to determine if theretardation of the reptation dynamics is due to the chain immobilization or chain topological confinement or increased chain structural frustration in the vicinity of the nanoparticle surface. Also, the nature of entanglements will be clarified, comparing the model of entanglement as the topological constraint with the dynamic fragility approach based on dynamically rearranging chain cluster.
Mark
GAP205/10/2259
Default language
Czech
People responsible
Jančář Josef, prof. RNDr., CSc. - principal person responsible
Units
Faculty of Chemistry
- (2010-01-05 - not assigned)
Results
SVĚRÁK, T. Aktivátory mletí používané v průmyslu cementu. In V. odborný seminář Kvalita cementu 2011. Brno: VÚSTAH, 2011. s. 51-60. ISBN: 978-80-87397-04-6.
Detail
BÁLKOVÁ, R.; JANČÁŘ, J.; SADÍLEK, J. Deformační morfologie strukturně odlišného iPP pozorovaná pod CLSM in situ. Strojírenská technologie, 2010, roč. 15, č. 4, s. 8-12. ISSN: 1211-4162.
Detail
JANČÁŘ, J.; BÁLKOVÁ, R. On the differences in micro-deformation mechanism between isotactic polypropylene and b-nucleated iPP as revealed by the confocal laser scanning microscopy. Polymer Engineering and Science, 2011, vol. 51, no. 9, p. 2434-2438. ISSN: 0032-3888.
Detail
JANČÁŘ, J.; TOCHÁČEK, J. Effect of Multiple Extrusion on Impact Fracture of Three Poly(propylene) Impact Copolymers. Macromolecular symposia, 2013, vol. 330, no. 1, p. 166-176. ISSN: 1521-3900.
Detail
SVĚRÁK, T.; DOHNAL, M.; BULEJKO, P.; SCHWARZEROVÁ, L. Efektivní využití údajů o jemně mletém uhlí fuzzy metodou. In Kvalita cementu 2012, VÚSTAH, Výzkumný ústav stavebních hmot. Brno: VÚSTAH a.s., 2012. s. 61-72. ISBN: 978-80-87397-10-7.
Detail
JANČÁŘ, J.; BÁLKOVÁ, R. Effect of Interfacial Interactions on the Crystal Growth Rate in Model PE/SiO2 Nanocomposites: Comparing Experiments With Lauritzen-Hoffman Model and MD Simulation. Polymer Engineering and Science, 2013, vol. 53, no. 12, p. 2696-2704. ISSN: 0032-3888.
Detail
JANČÁŘ, J.; FIORE, K. Molecular weight scaling of the spherulite growth rate in isothermally melt crystallized polyethylene nanocomposites. Polymer, 2011, vol. 52, no. 10, p. 5851-5857. ISSN: 0032-3861.
Detail