The effect of anisometry of dispersed droplets on their coalescence during annealing of polymer blends

0367514 - ÚMCH 2012 RIV DE eng J - Journal Article
Fortelný, Ivan - Jůza, Josef - Vacková, Taťana - Šlouf, Miroslav
The effect of anisometry of dispersed droplets on their coalescence during annealing of polymer blends.
Colloid and Polymer Science. Roč. 289, 17/18 (2011), s. 1895-1903. ISSN 0303-402X. E-ISSN 1435-1536
R&D Projects: GA AV ČR IAA200500903; GA ČR GP106/09/P272
Institutional research plan: CEZ:AV0Z40500505
Keywords : coalescence in quiescent state * polymer blends * droplet anisometry
Subject RIV: BJ - Thermodynamics
Impact factor: 2.331, year: 2011

Abstract Approximate theory of van der Waals forces induced coalescence in polymer blends containing anisometric droplets at the coalescence origin was derived. The results were compared with the phase structure evolution during annealing polypropylene/cyclic olefin copolymer (PP/COC) (70/30) blends with highly anisometric dispersed particles. It was showed that the droplet anisometry remarkably influenced average distance between a droplet and its nearest neighbor, /h/, and, consequently, maximum volume fraction of droplets for which the theory of coalescence is applicable. On the other hand, our calculations confirmed that the course of the coalescence was only slightly affected by the droplet anisometry in blends where /h/ at the coalescence origin was substantially larger than the critical distance for rupture of the matrix film.
Permanent Link: http://hdl.handle.net/11104/0202168