» Projects » Grant List » Investigation of flow behaviour for a novel class of metallocene-based polymers
Investigation of flow behaviour for a novel class of metallocene-based polymers
- Identification:IAA200600703 - Grant Agency of the Academy of Sciences of the Czech Republic
- Duration: 2007 - 2011
- Principal investigator: Ing. Jiří David CSc.
- Co-investigator: Doc. Ing. Martin Zatloukal PhD. (Faculty of Technology, Tomas Bata University)
Subject of research
At the 90s' new metallocene catalysts enabled synthesis of polymers exhibiting narrow molecular weight distribution and very well controlled molecular architecture and molecular weight. In spite of much better product qualities of these polymers in comparison with the conventional ones their wider usage is significantly limited due to poor processability in the standard technologies. Recent publications indicate a possibility of elimination of this shortage by controlled implementation of the long chain branches on the main chain or by presence of high molecular weight component fraction in the polymer (bimodal molecular weight distribution). This project aims at revealing a relationship between molecular architecture of these polymers and their rheological flow behaviour. Attention also will be paid to the development of new experimental techniques for determination of the extensional viscosity and melt strength with respect to their specific behaviour in the melting temperature area.
