Dependence of the average size of particles formed during steady mixing on their concentration in immiscible polymer blends

0392434 - ÚMCH 2014 RIV US eng J - Journal Article
Fortelný, Ivan - Dimzoski, Bojan - Michálková, Danuše - Mikešová, Jana - Kaprálková, Ludmila
Dependence of the average size of particles formed during steady mixing on their concentration in immiscible polymer blends.
Journal of Macromolecular Science - Physics. Roč. 52, č. 5 (2013), s. 662-673. ISSN 0022-2348. E-ISSN 1525-609X
R&D Projects: GA ČR GAP106/11/1069
Institutional research plan: CEZ:AV0Z40500505
Institutional support: RVO:61389013
Keywords : blends * coalescence * droplet breakup
Subject RIV: BK - Fluid Dynamics
Impact factor: 0.619, year: 2013

A linear increase in the size of ethylene-propylene rubber particles with its content in polypropylene matrix at steady mixing in a batch mixer was observed. This type of the dependence is predicted by the theory of dynamic equilibrium between the droplet breakup and coalescence. However, theoretical calculation of droplet radius extrapolated to zero concentration of EPR and slope of the dependence of droplet radius versus concentration, based on the effective shear rate (related to mixing conditions), are in strong disagreement with the experimental results. Reasons for these discrepancies between theories and experimental results are thoroughly elucidated.
Permanent Link: http://hdl.handle.net/11104/0222082