Počet záznamů: 1  

Prediction of average droplet size in flowing immiscible polymer blends

  1. 1. 0475233 - UMCH-V 2018 RIV US eng J - Článek v odborném periodiku
    Fortelný, Ivan - Jůza, Josef
    Prediction of average droplet size in flowing immiscible polymer blends.
    Journal of Applied Polymer Science. Roč. 134, č. 35 (2017), s. 1-12, č. článku 45250. ISSN 0021-8995
    Grant CEP: GA ČR(CZ) GA14-17921S
    Institucionální podpora: RVO:61389013
    Klíčová slova: coalescence * droplet breakup * phase structure evolution
    Kód oboru RIV: CD - Makromolekulární chemie
    Obor OECD: Polymer science
    Impakt faktor: 1.901, rok: 2017

    The paper is focused on calculation of the average droplet size in immiscible blends during their steady flow. Available theoretical and experimental results of studies of the droplet breakup and coalescence are utilized to derive the equations describing dynamic equilibrium between the droplet breakup and coalescence. New expression for the coalescence efficiency, reliably reflecting recent theoretical results, is proposed. The equation for the average steady droplet size, controlled by the stepwise breakup mechanism and coalescence of droplets with not very different sizes, is derived for blends containing up to 10–20 vol % of the droplets. For blends with above approximate 20 vol % of the droplets, the breakup by the Tomotika mechanism and coalescence in highly polydisperse system is modeled. Results of the derived equations are compared with experimental data. Qualitative agreement is found for the dependence of the droplet size on the amount of the dispersed phase.
    Trvalý link: http://hdl.handle.net/11104/0272402